Ancient Imperiosaur

You can't tap more creatures to convoke Ancient Imperiosaur than is necessary to pay for the spell. In most cases, this means seven creatures. However, if there are any additional costs to cast Ancient Imperiosaur, you may use convoke to pay those additional costs as well.

Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.

If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.

Tapping a multicolored creature using convoke will pay for {1} or one mana of your choice of any of that creature's colors.

Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.

When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.

You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Trample, ward {2}
Ancient Imperiosaur enters with two +1/+1 counters on it for each creature that convoked it.

Archangel Elspeth

For the last ability, if a card in your graveyard has {X} in its mana cost, X is 0.

If the target of the second ability stops being a creature after the ability has resolved, it will also stop being an Angel until it becomes a creature again, if applicable.

The second ability doesn’t have a duration. It lasts until the creature leaves the battlefield.

[+1]: Create a 1/1 white Soldier creature token with lifelink.
[−2]: Put two +1/+1 counters on target creature. It becomes an Angel in addition to its other types and gains flying.
[−6]: Return all nonland permanent cards with mana value 3 or less from your graveyard to the battlefield.

Archpriest of Shadows

Backup confers only abilities that are actually printed below it. Any abilities that are gained by the permanent are ignored, including abilities gained due to a resolving spell or ability or copy effects.

If a backup ability causes another creature to gain abilities, the creature with backup will still have those abilities.

If a backup ability targets the creature with backup, that creature will get +1/+1 counters, but it won’t gain additional abilities.

If a permanent enters the battlefield as a copy of a card with a backup ability or a token is created that is a copy of that card, the order of the printed abilities is maintained.

The abilities that backup grants to the target creature are determined only once, at the time the ability triggers. They won’t change if the permanent with backup loses any abilities before the backup ability resolves.

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.)
Deathtouch
Whenever this creature deals combat damage to a player or battle, return target creature card from your graveyard to the battlefield.

Ayara, Widow of the Realm // Ayara, Furnace Queen

The first activated ability of Ayara, Widow of the Realm uses the mana value of the permanent you sacrificed as it last existed on the battlefield, not its mana value in the graveyard.

{T}, Sacrifice another creature or artifact: Ayara, Widow of the Realm deals X damage to target opponent or battle and you gain X life, where X is the sacrificed permanent's mana value.
{5}{R/P}: Transform Ayara. Activate only as a sorcery. ({R/P} can be paid with either {R} or 2 life.)

Ayara cherished her new machine servitors just as much as she once did her many suitors: not at all.

At the beginning of combat on your turn, return up to one target artifact or creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step.

Baral and Kari Zev

Baral and Kari Zev will count any instant or sorcery spell you cast during a turn, even if it wasn’t on the battlefield at the time. This means if you cast an instant or sorcery spell, then Baral and Kari Zev comes under your control, its triggered ability won’t trigger that turn.

If the spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.

If you cast a spell without paying its mana cost, you can’t choose to cast it for any alternative costs. You can, however, pay any additional costs. If the spell has any mandatory additional costs, you must pay those.

The spell you cast from your hand without paying its mana cost is cast during the resolution of the triggered ability. Timing restrictions of that spell based on card type are ignored. It will resolve before the spell that caused the ability to trigger.

First strike, menace
Whenever you cast your first instant or sorcery spell each turn, you may cast a spell with lesser mana value that shares a card type with it from your hand without paying its mana cost. If you don't, create First Mate Ragavan, a legendary 2/1 red Monkey Pirate creature token. It gains haste until end of turn.

Bloated Processor

Sacrifice another Phyrexian: Put a +1/+1 counter on Bloated Processor.
When Bloated Processor dies, incubate X, where X is its power. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Bloodfeather Phoenix

Bloodfeather Phoenix’s last ability triggers only if Bloodfeather Phoenix is in your graveyard at the moment the instant or sorcery spell you control deals damage to an opponent or battle. For example, if you cast a sorcery spell that deals damage to an opponent and also enough damage to Bloodfeather Phoenix to destroy it at the same time, Bloodfeather Phoenix’s ability won’t trigger.

Most instant or sorcery spells deal damage themselves, but a few cause other sources to deal damage. For example, a sorcery spell that says “Target creature you control deals damage equal to its power to any target” wouldn’t cause Bloodfeather Phoenix’s ability to trigger even if an opponent or battle was dealt damage, as it’s the creature dealing the damage, not the spell.

You choose whether to pay {R} as the triggered ability is resolving. Once the ability starts resolving, it’s too late for anyone to respond by removing Bloodfeather Phoenix from your graveyard to stop you from bringing it back.

Flying
Bloodfeather Phoenix can't block.
Whenever an instant or sorcery spell you control deals damage to an opponent or battle, you may pay {R}. If you do, return Bloodfeather Phoenix from your graveyard to the battlefield. It gains haste until end of turn.

Her blades were twin beacons, calling the worthy to glory and the wretched to despair.

Boon-Bringer Valkyrie

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.)
Flying, first strike, lifelink

Borborygmos and Fblthp

If there are one or fewer cards in your library, Borborygmos and Fblthp is put on the bottom of your library.

Only the controller of Borborygmos and Fblthp can activate its last ability, and only if it’s on the battlefield.

The first ability of Borborygmos and Fblthp triggers and goes on the stack without a target. If you discard one or more land cards, the second “reflexive” triggered ability will trigger. You’ll choose the target creature for that second ability at that time.

You can’t discard nonland cards, even if you want to.

Whenever Borborygmos and Fblthp enters or attacks, draw a card, then you may discard any number of land cards. When you discard one or more cards this way, Borborygmos and Fblthp deals twice that much damage to target creature.
{1}{U}: Put Borborygmos and Fblthp into its owner's library third from the top.

"All worlds will know perfection."
—Elesh Norn

Breach the Multiverse

The cards you choose can be ones that were just milled or ones that were already in the graveyard.

The creatures you control will be Phyrexians until they leave the battlefield. Any of them that stops being a creature will also stop being a Phyrexian until it becomes a creature again, if applicable.

Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types.

Chandra, Hope's Beacon

A copy of a spell is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.

For the second loyalty ability, the spell you cast must be an instant or sorcery spell, although the exiled card doesn't necessarily have to be. For example, if you exile a creature card that has an Adventure, you can cast that Adventure spell.

If the spell has damage divided as it was cast, the division can't be changed (although the targets receiving that damage still can). The same is true of spells that distribute counters.

If the spell that's copied has an X whose value was determined as it was cast, the copy will have the same value of X.

If the spell that's copied is modal (that is, it includes a choice from a bulleted list of effects), the copy will have the same mode. A different mode can't be chosen.

If you copy a spell, you control the copy. It will resolve before the original spell does.

The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).

You can't choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.

Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy. This ability triggers only once each turn.
[+2]: Add two mana in any combination of colors.
[+1]: Exile the top five cards of your library. Until the end of your next turn, you may cast an instant or sorcery spell from among those exiled cards.
[−X]: Chandra, Hope's Beacon deals X damage to each of up to two targets.

Chrome Host Seedshark

If the noncreature spell has {X} in its mana cost, use the value chosen for X when calculating that spell’s mana value.

Flying
Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

City on Fire

If an effect such as that of Chandra's Pyrohelix asks you to divide damage among targets, you must divide the unmodified damage before tripling it.

If you control two Cities on Fire, damage dealt by sources you control will be multiplied by 9. If you control three, it will be multiplied by 27, and so on.

While you control City on Fire, if a creature you control with trample would deal combat damage to a blocking creature, you must assign its unmodified damage. For example, a 3/3 creature with trample blocked by a 2/2 creature can have 1 damage assigned to the defending player. It will then deal 6 damage to the blocking creature (2 tripled) and 3 to the defending player (1 tripled).

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
If a source you control would deal damage to a permanent or player, it deals triple that damage instead.

Complete the Circuit

The "as though they had flash" effect applies only to casting sorcery spells. It does not, for example, change when you may activate abilities that can be activated "only as a sorcery."

You may choose different new targets for each of the copies.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
You may cast sorcery spells this turn as though they had flash.
When you next cast an instant or sorcery spell this turn, copy that spell twice. You may choose new targets for the copies.

Her warning raced through the roots and rivers of Ixalan: prepare for war.

Deeproot Wayfinder

The land card you return from your graveyard, if any, isn’t a target of the ability. You choose that card as the ability is resolving, after you surveil 1. It can be a land card you just put into your graveyard or one that was already there.

Whenever Deeproot Wayfinder deals combat damage to a player or battle, surveil 1, then you may return a land card from your graveyard to the battlefield tapped. (To surveil 1, look at the top card of your library. You may put that card into your graveyard.)

Djeru and Hazoret

Once Djeru and Hazoret has legally attacked during the turn it came under your control, causing it to lose haste by adding cards to your hand won’t cause it to stop attacking. Similarly, causing it to lose vigilance after it has attacked won’t cause it to become tapped.

As long as you have one or fewer cards in hand, Djeru and Hazoret has vigilance and haste.
Whenever Djeru and Hazoret attacks, look at the top six cards of your library. You may exile a legendary creature card from among them. Put the rest on the bottom of your library in a random order. Until end of turn, you may cast the exiled card without paying its mana cost.

Doomskar Warrior

In some unusual situations (mostly involving damage redirection), Doomskar Warrior may deal combat damage to multiple players and/or battles at the same time. If this happens, its ability will trigger for each of those players and/or battles. Each ability will resolve separately, allowing you to look at a number of cards equal to the damage dealt to that specific player or battle.

Backup 1
Trample
Whenever this creature deals combat damage to a player or battle, look at that many cards from the top of your library. You may reveal a creature or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Drana and Linvala

Drana and Linvala gains only activated abilities. It doesn’t gain triggered abilities or static abilities. Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities; they have colons in their reminder texts.

If an activated ability references the creature that has it by name, treat Drana and Linvala’s version of that ability as though it referenced Drana and Linvala by name instead. For example, if an opponent controls Onakke Javelineer, Drana and Linvala has the ability “{T}: Drana and Linvala deals 2 damage to target player or battle.”

If multiple players control a Drana and Linvala, exactly what abilities each of them has can get complex, based on what order they entered the battlefield. However, as none of those abilities can be activated, we won’t waste a lot of your time getting into it.

Once an ability has been activated, it doesn’t matter if Drana and Linvala loses that ability because the opposing creature with that ability leaves the battlefield (or, more optimistically, you gain control of it).

Flying, vigilance
Activated abilities of creatures your opponents control can't be activated.
Drana and Linvala has all activated abilities of all creatures your opponents control. You may spend mana as though it were mana of any color to activate those abilities.

"We sailed to Ixalan guided by a promise—the Age of Everflowing Blood. No machine will take that from us."

Dusk Legion Duelist

Vigilance
Whenever one or more +1/+1 counters are put on Dusk Legion Duelist, draw a card. This ability triggers only once each turn.

Elesh Norn // The Argent Etchings

Elesh Norn’s triggered ability will trigger separately for each permanent dealt damage by a source an opponent controls, plus once if you’re dealt damage by that source. For example, if an opponent casts a spell that deals damage to you and two creatures you control, Elesh Norn’s ability will trigger three times. Each of those abilities will cause that opponent to lose 2 life unless they pay {1}.

Similarly, the triggered ability will trigger separately for each source an opponent controls that deals damage to you or a permanent you control. For example, if three creatures controlled by an opponent block and deal damage to an attacking creature you control, Elesh Norn’s ability will trigger three times.

Vigilance
Whenever a source an opponent controls deals damage to you or a permanent you control, that source's controller loses 2 life unless they pay {1}.
{2}{W}, Sacrifice three other creatures: Exile Elesh Norn, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery.

(As this Saga enters and after your draw step, add a lore counter.)
I — Incubate 2 five times, then transform all Incubator tokens you control.
II — Creatures you control get +1/+1 and gain double strike until end of turn.
III — Destroy all other permanents except for artifacts, lands, and Phyrexians. Exile The Argent Etchings, then return it to the battlefield (front face up).

Errant and Giada

Errant and Giada lets you look at the top card of your library whenever you want (with one restriction—see below), even if you don’t have priority. This action doesn’t use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.

If the top card of your library changes while you’re casting a spell, playing a land, or activating an ability, you can’t look at the new top card until you finish doing so. This means that if you cast the top card of your library, you can’t look at the next one until you’re done paying for that spell.

Flash
Flying
You may look at the top card of your library any time.
You may cast spells with flash or flying from the top of your library.

Etali, Primal Conqueror // Etali, Primal Sickness

Any cards not cast, including land cards, remain in exile. They can’t be cast on later turns.

If an exiled card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.

If you cast a card “without paying its mana cost,” you can’t pay any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, those must be paid to cast the card.

If you cast any of the exiled cards, you do so as part of the resolution of the triggered ability. You can’t wait to cast them later in the turn. Timing restrictions based on a card’s type are ignored.

If you cast more than one of the exiled cards, you choose the order in which to cast them. A spell you cast this way can be the target of a later spell you cast this way. However, permanent spells cast this way won’t resolve until you’re done casting spells, so the permanents they become can’t be the target of spells cast this way. For example, if you exile Twincast and Lightning Strike, you can cast Lightning Strike and then cast Twincast targeting it; but if you exile a creature card and an Aura card, you can’t cast that Aura targeting that creature.

In a multiplayer game, if a player leaves the game, all cards that player owns leave as well. If you leave the game, any spells or permanents you control from Etali’s ability are exiled.

Losing the game because a player (preferably an opponent) has ten or more poison counters is a rule of the game. Etali, Primal Sickness doesn’t have to still be on the battlefield when someone (preferably an opponent) gets their tenth poison counter.

Trample
When Etali, Primal Conqueror enters, each player exiles cards from the top of their library until they exile a nonland card. You may cast any number of spells from among the nonland cards exiled this way without paying their mana costs.
{9}{G/P}: Transform Etali. Activate only as a sorcery.

The contagion spreads and the Multiverse quakes.

Trample, indestructible
Whenever Etali, Primal Sickness deals combat damage to a player, they get that many poison counters. (A player with ten or more poison counters loses the game.)

Faerie Mastermind

Faerie Mastermind doesn’t need to have been under your control when the first card is drawn for its ability to trigger. As long as you control it when an opponent draws their second card in a turn, that ability will trigger.

Flash
Flying
Whenever an opponent draws their second card each turn, you draw a card.
{3}{U}: Each player draws a card.

Ghalta and Mavren

Although the Dinosaur token enters the battlefield attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example).

For both modes, the value of X is determined as the ability resolves.

If you choose the first mode and there are no other attacking creatures, you’ll create a 0/0 Dinosaur token. Unless something else is immediately raising its toughness, the token will die. You won’t have time to respond with a spell or ability to try and save it. A similar situation occurs if the greatest power among other attacking creatures is 0 or less.

If you choose the second mode and there are no other attacking creatures, you won’t create any Vampire tokens.

You choose which player, planeswalker, or battle the Dinosaur token is attacking. It doesn’t have to be the same player, planeswalker, or battle that Ghalta and Mavren is attacking.

Trample
Whenever you attack, choose one —
• Create a tapped and attacking X/X green Dinosaur creature token with trample, where X is the greatest power among other attacking creatures.
• Create X 1/1 white Vampire creature tokens with lifelink, where X is the number of other attacking creatures.

Glissa, Herald of Predation

At the beginning of combat on your turn, choose one —
• Incubate 2 twice. (To incubate 2, create an Incubator token with two +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)
• Transform all Incubator tokens you control.
• Phyrexians you control gain first strike and deathtouch until end of turn.

Unleashed on new worlds, the Phyrexians were driven by a simple imperative: spread and conquer.

Glistening Dawn

Use the number of lands you control as Glistening Dawn resolves to determine the value of X.

Incubate X twice, where X is the number of lands you control. (To incubate X, create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Grafted Butcher

When Grafted Butcher enters, Phyrexians you control gain menace until end of turn.
Other Phyrexians you control get +1/+1.
{3}{B}, Sacrifice an artifact or creature: Return Grafted Butcher from your graveyard to the battlefield. Activate only as a sorcery.

She was hope incarnate, an incandescent bulwark against the tide of machines.

Guardian of Ghirapur

Flying
When Guardian of Ghirapur enters, exile up to one other target creature or artifact you control. Return it to the battlefield under its owner's control at the beginning of the next end step.

"*Compleat* the faith, *compleat* the god."
—Ajani Goldmane

Heliod, the Radiant Dawn // Heliod, the Warped Eclipse

If a spell you cast has {X} in its mana cost, you choose the value of X before calculating the spell’s total cost. For example, if a spell’s mana cost is {X}{R} and your opponents have drawn two cards this turn, you could choose 5 as the value of X and pay {3}{R} to cast the spell.

If there are additional costs to cast a spell, or if the cost to cast a spell is increased by an effect (such as the one created by Thalia, Guardian of Thraben’s ability), apply those increases before applying cost reductions.

That ability can’t reduce the amount of colored mana you pay for a spell. It reduces only the generic mana component of that cost.

The cost reduction can apply to alternative costs such as flashback costs.

The last ability of Heliod, the Warped Eclipse doesn’t change the mana cost or mana value of any spell. It changes only the total cost you pay.

The “as though they had flash” effect applies only to casting spells. It does not, for example, change when you may activate abilities that can be activated “only as a sorcery.”

When Heliod, the Radiant Dawn enters, return target enchantment card that isn't a God from your graveyard to your hand.
{3}{U/P}: Transform Heliod, the Radiant Dawn. Activate only as a sorcery. ({U/P} can be paid with either {U} or 2 life.)

"*Compleat* the god, *compleat* the plane."
—Ajani Goldmane

You may cast spells as though they had flash.
Spells you cast cost {1} less to cast for each card your opponents have drawn this turn.

Hidetsugu and Kairi

If the card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.

The last triggered ability targets the opponent. If that player is an illegal target as the ability tries to resolve, the ability won’t resolve and none of its effects will happen. You won’t exile a card.

The two cards you put on top of your library can be from the three you just drew or ones that were already in your hand.

You choose whether or not to cast the instant or sorcery card as the last triggered ability resolves. If you do, you do so as part of the resolution of that ability. You can’t wait to cast it later in the turn. Timing restrictions based on the card’s type are ignored.

Flying
When Hidetsugu and Kairi enters, draw three cards, then put two cards from your hand on top of your library in any order.
When Hidetsugu and Kairi dies, exile the top card of your library. Target opponent loses life equal to its mana value. If it's an instant or sorcery card, you may cast it without paying its mana cost.

Hoarding Broodlord

As long as that card remains exiled, you may look at it. This remains true after Hoarding Broodlord leaves the battlefield.

If another player gains control of Hoarding Broodlord, it's still you who can look at and play the exiled card. That player won't be able to look at or play the exiled card.

Convoke
Flying
When Hoarding Broodlord enters, search your library for a card, exile it face down, then shuffle. For as long as that card remains exiled, you may play it.
Spells you cast from exile have convoke.

Inga and Esika

Creatures you control have vigilance and "{T}: Add one mana of any color. Spend this mana only to cast a creature spell."
Whenever you cast a creature spell, if three or more mana from creatures was spent to cast it, draw a card.

The rest of the Gatewatch retreated. Chandra and Wrenn went in blazing.

Into the Fire

If you choose the second mode, you choose how many cards to put on the bottom of your library as Into the Fire resolves. You may choose to put no cards on the bottom of your library and just draw a card.

Choose one —
• Into the Fire deals 2 damage to each creature, planeswalker, and battle.
• Put any number of cards from your hand on the bottom of your library, then draw that many cards plus one.

Invasion of Alara // Awaken the Maelstrom

A Siege’s controller can’t be its protector. If a Siege’s protector ever gains control of it, they choose a new player to be its protector. This is a state-based action.

A battle can be attacked by all players other than its protector. Notably, this means a Siege’s controller can attack it.

A battle can be dealt damage and be target of spells and/or abilities that target “any target.”

A battle’s “defense” is displayed in the bottom right corner of the card. A battle enters the battlefield with that number of defense counters. If another permanent enters the battlefield as a copy of a battle, it also enters with that number of defense counters.

Any enters-the-battlefield abilities of the copied permanent will trigger when the token enters the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the copied permanent will also work.

As a Siege enters the battlefield, its controller chooses an opponent to be its protector.

Awaken the Maelstrom has two targets: the player who will draw cards and the permanent an opponent controls that will be destroyed. You must choose legal targets for both to cast Awaken the Maelstrom. All other choices are made on resolution. Specifically, this means you can create a token that’s a copy of the artifact you just put onto the battlefield (which perhaps you just drew) and then put +1/+1 counters on it if it’s also a creature.

Battles can’t attack or block, even if one also becomes a creature. If an attacking or blocking creature somehow becomes a battle in addition to being a creature, it is removed from combat.

Damage dealt to a battle causes that many defense counters to be removed from it.

For Invasion of Alara’s triggered ability, if you exile two nonland cards with mana value 4 or less, but you don’t cast one of them, the one you don’t put into your hand will remain in exile. It won’t be put on the bottom of your library.

If a Siege never had defense counters on it (perhaps because a permanent became a copy of one), it can’t have its last defense counter removed. It will be put into its owner’s graveyard. You won’t exile it or cast the other face.

If a battle has no defense counters, and it isn’t the source of a triggered ability that has triggered but not yet left the stack, that battle is put into its owner’s graveyard. This is a state-based action. This doesn’t cause a Siege’s intrinsic triggered ability to trigger.

If a battle that’s being attacked somehow stops being a battle, it is removed from combat. Similarly, if its controller changes in the middle of combat, it is removed from combat.

If a non-battle permanent that is already on the battlefield become a copy of a Siege, its controller chooses one of their opponents to be that battle’s protector. However, it will most likely be put into its owner’s graveyard because it has no defense counters (see below).

If a permanent that is represented by a transforming double-faced card becomes a copy of a Siege, it will be exiled as that Siege’s triggered ability resolves, then it will be cast transformed. Note that this applies only to transforming double-faced cards, not to modal double-faced cards that can normally be played using either face.

If a token or a card that isn’t represented by a transforming double-faced card becomes a copy of a Siege, it can’t be cast as its triggered ability resolves. It will remain in exile. If it’s a token, it will cease to exist the next time state-based actions are performed.

If the copied permanent has {X} in its mana cost, X is 0.

If the copied permanent is a token, the token that’s created copies the original characteristics of that token as stated by the effect that created that token.

If the copied permanent is copying something else, then the token enters the battlefield as whatever that permanent copied.

If you exile only one nonland card with mana value 4 or less, you’ll have the option to cast it. If you don’t, you’ll put it into your hand.

In a multiplayer game, if the protector of a battle leaves the game and that battle is not currently being attacked, its controller chooses a new protector for it as a state-based action. If it is being attacked, its controller chooses a new protector for it once no creatures are attacking it. This means that it continues to be attacked and can be dealt combat damage as normal.

Only creatures controlled by a battle’s protector can block creatures that are attacking that battle. This means a Siege’s controller can never assign creatures to block for it.

Sieges each have an intrinsic triggered ability. That ability is “When the last defense counter is removed from this permanent, exile it, then you may cast it transformed without paying its mana cost.”

The token copies exactly what was printed on the original permanent and nothing else (unless that permanent is copying something else or is a token; see below). It doesn’t copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.

When Invasion of Alara enters, exile cards from the top of your library until you exile two nonland cards with mana value 4 or less. You may cast one of those two cards without paying its mana cost. Put one of them into your hand. Then put the other cards exiled this way on the bottom of your library in a random order.

Awaken the Maelstrom is all colors.
Target player draws two cards. You may put an artifact card from your hand onto the battlefield. Create a token that's a copy of a permanent you control. Distribute three +1/+1 counters among one, two, or three creatures you control. Destroy target permanent an opponent controls.

Invasion of Arcavios // Invocation of the Founders

A copy of a spell is created on the stack, so it’s not “cast.” Abilities that trigger when a player casts a spell won’t trigger.

If the spell has damage divided as it was cast, the division can’t be changed (although the targets receiving that damage still can). The same is true of spells that distribute counters.

If the spell that’s copied has an X whose value was determined as it was cast, the copy will have the same value of X.

If the spell that’s copied is modal (that is, it includes a choice from a bulleted list of effects), the copy will have the same mode. A different mode can’t be chosen.

In a casual game, a card you choose from outside the game comes from your personal collection. In a tournament event, a card you choose from outside the game comes from your sideboard. You may look at your sideboard at any time.

The copy will have the same targets as the spell it’s copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can’t choose a new legal target, then it remains unchanged (even if the current target is illegal).

You can’t choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.

You don’t have to declare up front where you’re going to search. You may search your library, pause, sigh, check out your graveyard, frown meaningfully at your opponent, then finally grab a game-winning sorcery card from your sideboard. Bit dramatic though.

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When Invasion of Arcavios enters, search your library, graveyard, and/or outside the game for an instant or sorcery card you own, reveal it, and put it into your hand. If you search your library this way, shuffle.

No professors, no grades, no room for mistakes.

Whenever you cast an instant or sorcery spell from your hand, you may copy that spell. You may choose new targets for the copy.

Card (160)	Type	^{$0.00 (0.00)} Price
Ancient Imperiosaur	Creature	$0.00 ^(0.00)
Ancient Imperiosaur	Creature	$0.00 ^(0.00)
Archangel Elspeth	Planeswalker	$0.00 ^(0.00)
Archangel Elspeth	Planeswalker	$0.00 ^(0.00)
Archpriest of Shadows	Creature	$0.00 ^(0.00)
Archpriest of Shadows	Creature	$0.00 ^(0.00)
Ayara, Widow of the Realm // Ayara, Furnace Queen	Creature	$0.00 ^(0.00)
Ayara, Widow of the Realm // Ayara, Furnace Queen	Creature	$0.00 ^(0.00)
Baral and Kari Zev	Creature	$0.00 ^(0.00)
Baral and Kari Zev	Creature	$0.00 ^(0.00)
Bloated Processor	Creature	$0.00 ^(0.00)
Bloated Processor	Creature	$0.00 ^(0.00)
Bloodfeather Phoenix	Creature	$0.00 ^(0.00)
Bloodfeather Phoenix	Creature	$0.00 ^(0.00)
Boon-Bringer Valkyrie	Creature	$0.00 ^(0.00)
Boon-Bringer Valkyrie	Creature	$0.00 ^(0.00)
Borborygmos and Fblthp	Creature	$0.00 ^(0.00)
Borborygmos and Fblthp	Creature	$0.00 ^(0.00)
Breach the Multiverse	Sorcery	$0.00 ^(0.00)
Breach the Multiverse	Sorcery	$0.00 ^(0.00)
Chandra, Hope's Beacon	Planeswalker	$0.00 ^(0.00)
Chandra, Hope's Beacon	Planeswalker	$0.00 ^(0.00)
Chrome Host Seedshark	Creature	$0.00 ^(0.00)
Chrome Host Seedshark	Creature	$0.00 ^(0.00)
City on Fire	Enchantment	$0.00 ^(0.00)
City on Fire	Enchantment	$0.00 ^(0.00)
Complete the Circuit	Instant	$0.00 ^(0.00)
Complete the Circuit	Instant	$0.00 ^(0.00)
Deeproot Wayfinder	Creature	$0.00 ^(0.00)
Deeproot Wayfinder	Creature	$0.00 ^(0.00)
Djeru and Hazoret	Creature	$0.00 ^(0.00)
Djeru and Hazoret	Creature	$0.00 ^(0.00)
Doomskar Warrior	Creature	$0.00 ^(0.00)
Doomskar Warrior	Creature	$0.00 ^(0.00)
Drana and Linvala	Creature	$0.00 ^(0.00)
Drana and Linvala	Creature	$0.00 ^(0.00)
Dusk Legion Duelist	Creature	$0.00 ^(0.00)
Dusk Legion Duelist	Creature	$0.00 ^(0.00)
Elesh Norn // The Argent Etchings	Creature	$0.00 ^(0.00)
Elesh Norn // The Argent Etchings	Enchantment	$0.00 ^(0.00)
Errant and Giada	Creature	$0.00 ^(0.00)
Errant and Giada	Creature	$0.00 ^(0.00)
Etali, Primal Conqueror // Etali, Primal Sickness	Creature	$0.00 ^(0.00)
Etali, Primal Conqueror // Etali, Primal Sickness	Creature	$0.00 ^(0.00)
Faerie Mastermind	Creature	$0.00 ^(0.00)
Faerie Mastermind	Creature	$0.00 ^(0.00)
Ghalta and Mavren	Creature	$0.00 ^(0.00)
Ghalta and Mavren	Creature	$0.00 ^(0.00)
Glissa, Herald of Predation	Creature	$0.00 ^(0.00)
Glissa, Herald of Predation	Creature	$0.00 ^(0.00)

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