Ace's Baseball Bat

If each Dalek that could block the equipped creature is tapped or is affected by a spell or ability that says it can't block, then none of them block. If there's a cost associated with having each of those creatures block, its controller isn't forced to pay the cost, so they don't have to block in that case either.

If one creature is somehow equipped with multiple Ace's Baseball Bats, that creature still requires only a single Dalek to block it.

Only one Dalek is required to block the equipped creature. Other Dalek and non-Dalek creatures may also block that creature and are free to block other creatures or not block at all.

The defending player, not the attacking player, chooses which Dalek blocks the equipped creature.

Equipped creature gets +3/+0.
As long as equipped creature is attacking, it has first strike and must be blocked by a Dalek if able.
Equip legendary creature {1}
Equip {3}

Ace, Fearless Rebel

Although Doctor's companion is a new variant of the partner ability, the rules for partner have not otherwise changed. Notably, Time Lord Doctors and cards with Doctor's companion do not interact with cards which have another partner ability.

An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.

Both commanders start in the command zone, and the remaining 98 cards (or 58 cards in a Commander Draft game) of your deck are shuffled to become your library.

If something refers to your commander while you have two commanders, it refers to one of them of your choice. If you are instructed to perform an action on your commander (e.g. put it from the command zone into your hand due to Command Beacon), you choose one of your commanders at the time the effect happens.

If you choose no target for Ace's Nitro-9 ability, you will put a +1/+1 counter on it. However, if you choose a target and it is an illegal target as the ability tries to resolve, you won't put a +1/+1 counter on Ace. In either case, no fight will happen and no creature will deal or be dealt damage.

If your Commander deck has two commanders, you can include only cards whose own color identities are also found in your commanders' combined color identities.

Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 combat damage from any one of them, not from both of them combined.

The Doctor's companion ability allows you to have two commanders if one has the ability and the other is a legendary creature that is a Time Lord Doctor and has no other creature types. Creatures with the changeling ability, for example, can't be a second commander this way.

Nitro-9 — Whenever Ace, Fearless Rebel attacks, you may sacrifice an artifact. When you do, put a +1/+1 counter on Ace, Fearless Rebel, then it fights up to one target creature defending player controls.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Adipose Offspring

A permanent's mana value is determined solely by the mana symbols printed in its upper right corner (unless that creature is the back face of a double-faced card, is a melded permanent, or is copying something else; see below). If the mana cost includes {X}, X is considered to be 0. If it's a single-faced card with no mana symbols in its upper right corner (because it's an animated land, for example), its mana value is 0. Ignore any alternative costs or additional costs (such as kicker) that were paid as the creature was cast.

Colored mana components of emerge costs can't be reduced with emerge.

For Adipose Offspring's last ability, use the toughness of the sacrificed creature as it existed when it was last on the battlefield, which may be different from its toughness in the graveyard.

Once you begin to cast a spell with emerge, no player may take actions until you're done. Notably, opponents can't try to remove the creature you wish to sacrifice.

The creature chosen to be sacrificed is still on the battlefield up through the time that you activate mana abilities. Its abilities may affect the spell's cost, be activated to generate mana, and so on. However, if it has an ability that triggers when a spell is cast, it will have been sacrificed before that ability can trigger.

The mana value of Adipose Offspring isn't affected by whether its emerge cost is paid. Its mana value is always 4.

The mana value of the back face of a transforming double-faced permanent is the mana value of its front face. The mana value of a melded permanent is the sum of the mana values of its front faces.

You may sacrifice a creature with a mana value of 0, such as a token creature that's not a copy of another permanent, to cast a spell for its emerge cost. You'll just pay the full emerge cost with no reduction.

You may sacrifice a creature with mana value greater than or equal to the emerge cost. If you do, you'll pay only the colored mana component of the emerge cost.

Emerge {5}{W} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
When Adipose Offspring enters, create a 2/2 white Alien creature token. If Adipose Offspring's emerge cost was paid, instead create X of those tokens, where X is the sacrificed creature's toughness.

Adric, Mathematical Genius

Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities (such as equip) are activated abilities and will have a colon in their reminder text.

Adric, Mathematical Genius can copy any activated or triggered ability on the stack, not just one with targets.

Adric, Mathematical Genius's first ability targets an activated or triggered ability that is on the stack and creates another instance of that ability on the stack. It doesn't cause any object to gain an ability.

Any choices made when the ability resolves won't have been made yet when it's copied. Any such choices will be made separately when the copy resolves. Most notably, if a triggered ability asks its controller to pay a cost, you pay that cost for the copy if you wish to have it paid.

If an ability is linked to a second ability, copies of that first ability are also linked to that second ability. If the second ability refers to "the exiled card," it refers to all cards exiled by the first ability and the copy. For example, if Fiend Hunter's enters-the-battlefield ability is copied and two creatures are exiled, they both return when Fiend Hunter leaves the battlefield.

If the ability has damage divided as it was put onto the stack, the division can't be changed, although the targets receiving that damage still can. The same is true of abilities that distribute counters.

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

If the ability that's copied is modal (that is, it says "Choose one —" or the like), the copy will have the same mode. A different mode can't be chosen.

The copy is created on the stack, so it's not "activated." Creating the copy won't cause abilities that trigger when a player activates an ability to trigger. Abilities that say that a triggered ability triggers additional times won't apply to copying a triggered ability.

The copy will have the same targets as the ability 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).

The copy will resolve before the original ability does.

The source of the copy from Adric, Mathematical Genius's first ability is the same as the source of the original ability.

Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keywords (such as prowess) are triggered abilities and will use "when," "whenever," or "at" in their reminder text.

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

{2}{U}, {T}: Copy target activated or triggered ability you control. You may choose new targets for the copy.
Ultimate Sacrifice — {1}{U}, Sacrifice Adric: Counter target activated or triggered ability.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Alistair, the Brigadier

You choose whether to pay {8} as Alistair's second ability resolves. Notably, once it begins to resolve, none of your opponents may take actions that might change the result before it happens, such as casting a spell that destroys one of your historic permanents.

Whenever you cast a historic spell, create a 1/1 white Soldier creature token. (Artifacts, legendaries, and Sagas are historic.)
Whenever Alistair attacks, you may pay {8}. If you do, creatures you control get +X/+X until end of turn, where X is the number of historic permanents you control.

All of History, All at Once

A copy of a spell can be countered like any other spell, but each copy must be countered individually. Countering a spell with storm won't affect the copies.

Spells cast from zones other than a player's hand and spells that were countered are counted by the storm ability.

The copies are put directly onto the stack. They aren't cast and won't be counted by other spells with storm cast later in the turn.

The triggered ability that creates the copies can itself be countered by anything that can counter a triggered ability. If it is countered, no copies will be put onto the stack.

Time counters are usually found on cards with suspend and vanishing, but may be found on other cards as well. Notably, Sagas use lore counters to track their progress, not time counters. You can't move a Saga's chapters forward and backward this way.

To time travel, look at each permanent you control with a time counter on it and each suspended card you own in exile with a time counter on it. For each of them, you choose whether you want to put a time counter on that card or permanent, remove a time counter from it, or do neither. Then those changes all happen simultaneously.

Time travel. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter.)
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Amy Pond

"Partner with [name]" represents two abilities. The first is a triggered ability: "When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle."

A suspended card is a card that (1) has suspend, (2) is in exile, and (3) has one or more time counters on it.

Amy Pond has two different partner abilities, but you can't have Amy, Rory, and the Doctor as your commanders at the same time. Amy must choose one of the two. Even if your other commander is one of the Doctor cards, however, the "Partner with Rory Williams" ability can still search for Rory in a library.

If you remove the last time counter from a suspended card this way, you will cast that card.

Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text.

The second ability represented by the "partner with [name]" keyword modifies the rules for deck construction in the Commander variant and has no function outside of that variant. If a legendary creature card with "partner with [name]" is designated as your commander, the named legendary creature card can also be designated as your commander.

Partner with Rory Williams (When this creature enters, target player may put Rory into their hand from their library, then shuffle.)
Whenever Amy Pond deals combat damage to a player, choose a suspended card you own and remove that many time counters from it.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Amy's Home

When you planeswalk to Amy's Home and at the beginning of your upkeep, you may exile a nonland card from your hand with a number of time counters on it equal to its mana value. If it doesn't have suspend, it gains suspend.
Whenever chaos ensues, time travel. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter.)

An Unearthly Child

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II, III — Reveal cards from the top of your library until you reveal a Doctor card, a card with doctor's companion, or a Vehicle card. Put that card into your hand and the rest on the bottom of your library in a random order.

Antarctic Research Base

If you control no artifacts for the chaos ability, you will still choose a target creature you control, and it will still become a Plant in addition to its other types.

When you planeswalk to Antarctic Research Base and at the beginning of your upkeep, investigate.
Whenever chaos ensues, put X +1/+1 counters on target creature you control, where X is the number of artifacts you control. It becomes a Plant in addition to its other types.

Aplan Mortarium

As the triggered ability of the Alien Angel token resolves, it continues to be an artifact but will stop being both an Alien and an Angel until it becomes a creature again.

If an opponent casts a creature spell with flash while the token is attacking or blocking, the token is removed from combat because it stops being a creature. However, any creatures that it was blocking are still considered blocked.

Byzantium Radiation — At the beginning of your upkeep, put an exposure counter on Aplan Mortarium. Then you lose life equal to the number of exposure counters on it.
Whenever chaos ensues, create two 2/2 black Alien Angel artifact creature tokens with first strike, vigilance, and "Whenever an opponent casts a creature spell, this permanent isn't a creature until end of turn."

"Seal of the High Council of Gallifrey. Nicked it off the Master in the Death Zone."
—The Eleventh Doctor

Arcane Signet

If you don't have a commander, Arcane Signet's ability produces no mana.

If you have two commanders, the ability adds one mana of any color in their combined color identities.

If your commander is a card that has no colors in its color identity, Arcane Signet's ability produces no mana. It doesn't produce {C}.

{T}: Add one mana of any color in your commander's color identity.

"It is returning through the dark. And then, Doctor? Oh, but then he will knock four times."

As Foretold

A card's mana value is determined solely by the mana symbols printed in its upper right corner. The mana value is the total amount of mana in that cost, regardless of color. For example, a card with mana cost {1}{U}{U} has mana value 3. Ignore any alternative costs, additional costs, cost increases, or cost reductions that could apply to it. A card with no mana cost has a mana value of 0.

All counters with the same name are indistinguishable from other counters with that name. Cards from the Time Spiral block that interact with time counters will interact with As Foretold.

If a spell has no mana cost, its mana value is 0. You can cast it with As Foretold's alternative cost.

If the card has X in its mana cost, you must choose 0 as the value of X when casting it for another cost that doesn't include X. For example, if there are five time counters on As Foretold and you choose to use its effect to cast Pull from Tomorrow, X must be 0. X can't be 2, even though the spell's mana value would be 4.

If you control multiple As Foretolds, you may cast one spell for each of them paying {0}.

If you're casting a split card, only the mana value of the half you're casting is compared to the number of time counters on As Foretold. This is because only that half is on the stack at the time that you choose to apply the effect of As Foretold.

If you cast a spell for an alternative cost of {0}, you can't pay any other alternative costs, such as emerge costs. You can, however, pay additional costs, such as bargain. If the spell has any mandatory additional costs, such as that of Tormenting Voice, you must pay those to cast the spell.

At the beginning of your upkeep, put a time counter on As Foretold.
Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold.

"Look at the trees. Not a trace of foliage. The very bark stripped from the trunks. And the soil, barren."
—The Sixth Doctor

Ash Barrens

{T}: Add {C}.
Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Ashad, the Lone Cyberman

Casualty 2 means "As an additional cost to cast this spell, you may sacrifice a creature with power 2 or greater." and "When you cast this spell, if a casualty cost was paid for it, copy it. If the spell has any targets, you may choose new targets for the copy."

If you pay the casualty cost of a spell, the copy will resolve before the original spell.

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

You may sacrifice only one creature to pay a spell's casualty cost, and you copy the spell only once.

The first nonlegendary artifact spell you cast each turn has casualty 2. (As you cast it, you may sacrifice a creature with power 2 or greater. When you do, copy it. A copy of an artifact spell becomes a token.)
Whenever you sacrifice another creature, put a +1/+1 counter on Ashad, the Lone Cyberman.

Astrid Peth

If a resolving spell or ability instructs a specific creature to explore but that creature has left the battlefield, the creature still explores. If you reveal a nonland card this way, you won't put a +1/+1 counter on anything, but you may put the revealed card into your graveyard. Effects that trigger "whenever a creature you control explores" trigger if appropriate.

If no card is revealed, most likely because that player's library is empty, the exploring creature receives a +1/+1 counter.

Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done. Notably, opponents can't try to remove the exploring creature after you reveal a nonland card but before it receives a counter.

Whenever Astrid Peth enters or attacks, create a Food token.
Brand-new Sky — Whenever you sacrifice a Clue or Food, Astrid Peth explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Atraxi Warden

Cards exiled with suspend are exiled face up.

Due to a recent rules change to suspend, you are no longer required to cast the suspended card as the second triggered ability of suspend resolves. Instead, as the second triggered ability resolves, you may cast the card. Timing permissions based on the card's type are ignored. If you don't cast the card, it remains exiled with no time counters on it, and it's no longer suspended.

Exiling a card with suspend isn't casting that card. This action doesn't use the stack and can't be responded to.

If an effect refers to a "suspended card," that means a card that (1) has suspend, (2) is in exile, and (3) has one or more time counters on it.

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.

If the first triggered ability of suspend (the one that removes time counters) is countered, no time counter is removed. The ability will trigger again at the beginning of the card's owner's next upkeep.

If the second triggered ability is countered, the card can't be cast. It remains exiled with no time counters on it, and it's no longer suspended.

If the spell requires any targets, those targets are chosen when the spell is finally cast, not when it's exiled.

If you cast a card "without paying its mana cost," such as with suspend, you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, you must pay those if you want to cast the card.

Suspend is a keyword that represents three abilities. The first is a static ability that allows you to exile the card from your hand with the specified number of time counters (the number before the dash) on it by paying its suspend cost (listed after the dash). The second is a triggered ability that removes a time counter from the suspended card at the beginning of each of your upkeeps. The third is a triggered ability that gives you the option to cast the card when the last time counter is removed.

The mana value of a spell cast without paying its mana cost is determined by its mana cost, even though that cost wasn't paid.

When the last time counter is removed, the second triggered ability of suspend (the one that lets you cast the card) triggers. It doesn't matter why the last time counter was removed or what effect removed it.

You can exile a card in your hand using suspend any time you could cast that card. Consider its card type, any effects that modify when you could cast it (such as flash) and any other effects that stop you from casting it (such as from Meddling Mage's ability) to determine if and when you can do this. Whether you could actually complete all steps in casting the card is irrelevant. For example, you can exile a card with suspend that has no mana cost or that requires a target even if no legal targets are available at that time.

Flying
When Atraxi Warden enters, exile up to one target tapped creature.
Suspend 5—{1}{W} (Rather than cast this card from your hand, you may pay {1}{W} and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

Auton Soldier

Although the tokens enter the battlefield attacking, they were never declared as attackers. Abilities that trigger whenever a creature attacks won't trigger, including the myriad ability of the tokens. If there any costs to have a creature attack, those costs won't apply to the tokens.

Any enters-the-battlefield abilities of the copied creature 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 creature will also work.

Each token created by the myriad ability will be a copy of whatever Auton Soldier is copying, along with the listed exceptions. However, it doesn't copy whether Auton Soldier 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.

If myriad creates more than one token for any given player (due to an effect such as the one Doubling Season creates), you may choose separately for each token whether it's attacking the player or a planeswalker they control.

If the defending player is your only opponent, no tokens are put onto the battlefield.

If you choose not to have Auton Soldier enter the battlefield as a copy of another creature, it won't have myriad. It will also probably die due to having 0 toughness.

The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking at the time it became an attacking creature this combat, or the controller of the planeswalker or protector of the battle the creature was attacking at the time it became an attacking creature this combat.

The tokens all enter the battlefield at the same time.

You choose whether each token is attacking the player or a planeswalker they control as the token is created.

You may have Auton Soldier enter as a copy of any creature on the battlefield, except it isn't legendary, is an artifact in addition to its other types, and has myriad. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Bad Wolf Bay

You planeswalk immediately as the chaos ability resolves.

At the beginning of combat on your turn, exile up to one target creature. Return it to the battlefield under its owner's control at the beginning of the next end step.
When chaos ensues, cards can't enter from exile this turn. Then planeswalk.

Banish to Another Universe

If Banish to another Universe leaves the battlefield before its triggered ability resolves, the target permanent will not be exiled.

Affinity for historic permanents (This spell costs {1} less to cast for each artifact, legendary, and/or Saga permanent you control.)
When Banish to Another Universe enters, exile target nonland permanent an opponent controls until Banish to Another Universe leaves the battlefield.

"There will be no sacrifice this afternoon, Doctor. Or ever again."

Barbara Wright

As a Saga with read ahead enters the battlefield, its controller chooses a number from one to that Saga's greatest chapter number. The Saga enters the battlefield with the chosen number of lore counters. Neither choosing the number nor putting the counters on the Saga use the stack, and neither can be responded to.

Having multiple instances of read ahead doesn't cause anything unusual to happen. It functions the same way as having one instance of read ahead.

History Teacher — Sagas you control have read ahead. (As a Saga enters, choose a chapter and start with that many lore counters. Skipped chapters don't trigger.)
Doctor's companion (You can have two commanders if the other is the Doctor.)

"Do you recognize them? The Chagaskas. Your worst fears, my creativity."
—Zellin

Beast Within

If the permanent is still a legal target but is not destroyed (perhaps because it regenerated or has indestructible), its controller still gets the Beast token.

If the target permanent is an illegal target by the time Beast Within tries to resolve, the spell won't resolve. No player creates a Beast token. If the target is legal but not destroyed (most likely because it has indestructible), its controller does create a Beast token.

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

Become the Pilot

Only planeswalker and battle permanents can be attacked. Other permanents, such as creatures, can't be attacked.

Enchant noncommander creature
You control enchanted creature.
Enchanted creature gets +2/+2 and can't be blocked unless it's attacking its owner or a permanent its owner controls.

Besieged Viking Village

All creatures have "Boast — {1}: Put a +1/+1 counter on this creature." (Activate only if that creature attacked this turn and only once each turn.)
Whenever chaos ensues, put an indestructible counter on target creature you control that attacked this turn.

Bessie, the Doctor's Roadster

Haste
Whenever Bessie attacks, another target legendary creature can't be blocked this turn.
Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)

Bigger on the Inside

A spell's mana value is determined only by its mana cost. Ignore any alternative costs, additional costs, cost increases, or cost reductions.

As the activated ability resolves, it creates a continuous effect that won't begin to apply until the targeted player starts casting a spell this turn. It applies to that spell and the timestamp of that effect is the time that the spell was put on the stack.

Cascade triggers when you cast the spell, meaning that it resolves before that spell. If you end up casting the exiled card, it will go on the stack above the spell with cascade.

If a spell has multiple instances of cascade, each one triggers separately.

If a spell with cascade is countered, the cascade ability will still resolve normally.

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

Some cards, such as modal double-faced cards or adventurer cards, can be cast as one of two different spells, each with different mana costs. If the card you're casting as the cascade ability resolves is one of those cards, you may choose to cast it as either of those spells that has a lower mana value than the spell with cascade.

The mana value of a split card is determined by the combined mana cost of its two halves. If cascade allows you to cast a split card, you may cast either half but not both halves.

When the cascade ability resolves, you must exile cards. The only optional part of the ability is whether or not you cast the last card exiled.

You exile the cards face up. All players will be able to see them.

Enchant artifact or land
Enchanted permanent has "{T}: Target player adds two mana of any one color. The next spell they cast this turn has cascade." (When they cast their next spell, they exile cards from the top of their library until they exile a nonland card that costs less. They may cast it without paying its mana cost. They put the exiled cards on the bottom in a random order.)

Bill Potts

If the spell or ability 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 or ability that's copied is modal (that is, it says "Choose one —" or the like), the copy will have the same mode or modes. You can't choose different ones.

The copy made by Bill's triggered ability is created on the stack, so it's not "cast" or "activated."

The copy will have the same targets as the spell or ability it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. The new targets must be legal.

The first ability of Bill Potts will trigger as long as it is the only target of that spell or ability, even if that spell or ability could target multiple permanents.

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

Whenever you cast an instant or sorcery spell that targets only Bill Potts or activate an ability that targets only Bill Potts, copy that spell or ability. You may choose new targets for the copy. This ability triggers only once each turn.
Doctor's companion (You can have two commanders if the other is the Doctor.)

"I had to make them pay for what I discovered. They lied to us, the founding fathers of Gallifrey. Everything we were told was a lie."
—The Master

Blasphemous Act

Although players may respond to Blasphemous Act once it's been cast, once it's announced, they can't respond before the cost is calculated and paid.

Blasphemous Act's ability can't reduce the total cost to cast the spell below {R}.

The total cost to cast Blasphemous Act is locked in before you pay that cost. For example, if there are three creatures on the battlefield, including one you can sacrifice to add {C}, the total cost of Blasphemous Act is {5}{R}. Then you can sacrifice the creature when you activate mana abilities just before paying the cost.

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Blasphemous Act). The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.

This spell costs {1} less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.

Blink

People often assume that Sagas are a strict progression from top to bottom, but actually, from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly wobbly, timey-wimey . . . stuff. That is, the rules support chapter abilities that appear to be out of order, like those on Blink. The first ability triggers when the first and third lore counters are added. The last ability triggers when the second and fourth lore counters are placed on it.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I, III — Choose target creature. Its owner shuffles it into their library, then investigates. (They create a Clue token.)
II, IV — Create a 2/2 black Alien Angel artifact creature token with first strike, vigilance, and "Whenever an opponent casts a creature spell, this permanent isn't a creature until end of turn."

Bowie Base One

At the beginning of your end step, goad target creature controlled by the player to your left. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)
Whenever chaos ensues, target creature gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

"Apalapucia, voted number two planet in the top ten greatest destinations for the discerning intergalactic traveler."
—The Eleventh Doctor

Canopy Vista

Even though these lands have basic land types, they are not basic lands because "basic" doesn't appear on their type line. Notably, controlling two or more of them won't allow others to enter the battlefield untapped.

However, because these cards have basic land types, effects that specify a basic land type without also specifying that the land be basic can affect them. For example, a spell or ability that reads "Destroy target Forest" can target Canopy Vista, while one that reads "Destroy target basic Forest" cannot.

If one of these lands enters the battlefield at the same time as any number of basic lands, those other lands are not counted when determining if this land enters the battlefield tapped or untapped.

({T}: Add {G} or {W}.)
Canopy Vista enters tapped unless you control two or more basic lands.

"I must have made quite an impression."
—The Fourth Doctor

Canyon Slough

({T}: Add {B} or {R}.)
Canyon Slough enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

"Love is a form of hope and, like hope, love abides in the face of everything."
—The Thirteenth Doctor

Carpet of Flowers

You can target a different opponent each turn.

At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls.

Caught in a Parallel Universe

When you encounter Caught in a Parallel Universe, each player chooses a creature controlled by the player to their left. Each player creates a token that's a copy of the creature they chose, except it has menace. (Then planeswalk away from this phenomenon.)

Celestial Colonnade

A land that becomes a creature may be affected by "summoning sickness." You can't attack with it or use any of its {T} abilities (including its mana abilities) unless it began your most recent turn on the battlefield under your control. Note that summoning sickness cares about when that permanent came under your control, not when it became a creature.

Celestial Colonnade enters tapped.
{T}: Add {W} or {U}.
{3}{W}{U}: Until end of turn, Celestial Colonnade becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.

Card (1186)	Type	^{$0.00 (433.94)} Price
Ace's Baseball Bat	Artifact	$0.00 ^(0.00)
Ace's Baseball Bat - extendedart	Artifact	$0.00 ^(0.00)
Ace's Baseball Bat	Artifact	$0.00 ^(0.00)
Ace's Baseball Bat - extendedart	Artifact	$0.00 ^(0.15)
Ace, Fearless Rebel	Creature	$0.00 ^(0.00)
Ace, Fearless Rebel - extendedart	Creature	$0.00 ^(0.00)
Ace, Fearless Rebel	Creature	$0.00 ^(0.00)
Ace, Fearless Rebel - extendedart	Creature	$0.00 ^(0.00)
Adipose Offspring	Creature	$0.00 ^(0.00)
Adipose Offspring - extendedart	Creature	$0.00 ^(0.00)
Adipose Offspring	Creature	$0.00 ^(0.00)
Adipose Offspring - extendedart	Creature	$0.00 ^(0.00)
Adric, Mathematical Genius	Creature	$0.00 ^(0.00)
Adric, Mathematical Genius - extendedart	Creature	$0.00 ^(0.00)
Adric, Mathematical Genius	Creature	$0.00 ^(0.00)
Adric, Mathematical Genius - extendedart	Creature	$0.00 ^(0.00)
Alistair, the Brigadier	Creature	$0.00 ^(0.00)
Alistair, the Brigadier - extendedart	Creature	$0.00 ^(0.00)
Alistair, the Brigadier	Creature	$0.00 ^(0.00)
Alistair, the Brigadier - extendedart	Creature	$0.00 ^(0.00)
All of History, All at Once	Sorcery	$0.00 ^(0.00)
All of History, All at Once - extendedart	Sorcery	$0.00 ^(0.00)
All of History, All at Once	Sorcery	$0.00 ^(0.00)
All of History, All at Once - extendedart	Sorcery	$0.00 ^(0.00)
Amy Pond	Creature	$0.00 ^(0.00)
Amy Pond - extendedart	Creature	$0.00 ^(0.00)
Amy Pond	Creature	$0.00 ^(0.00)
Amy Pond - extendedart	Creature	$0.00 ^(0.00)
Amy's Home		$0.00 ^(0.00)
An Unearthly Child	Enchantment	$0.00 ^(0.00)
An Unearthly Child	Enchantment	$0.00 ^(0.00)
Antarctic Research Base		$0.00 ^(0.00)
Aplan Mortarium		$0.00 ^(0.00)
Arcane Signet	Artifact	$0.00 ^(0.00)
Arcane Signet	Artifact	$0.00 ^(0.00)
As Foretold	Enchantment	$0.00 ^(0.00)
As Foretold - extendedart	Enchantment	$0.00 ^(0.00)
As Foretold	Enchantment	$0.00 ^(0.00)
As Foretold - extendedart	Enchantment	$0.00 ^(0.15)
Ash Barrens	Land	$0.00 ^(0.00)
Ash Barrens	Land	$0.00 ^(0.00)
Ashad, the Lone Cyberman	Creature	$0.00 ^(0.00)
Ashad, the Lone Cyberman - extendedart	Creature	$0.00 ^(0.00)
Ashad, the Lone Cyberman	Creature	$0.00 ^(0.00)
Ashad, the Lone Cyberman - extendedart	Creature	$0.00 ^(0.00)
Astrid Peth	Creature	$0.00 ^(0.00)
Astrid Peth - extendedart	Creature	$0.00 ^(0.00)
Astrid Peth	Creature	$0.00 ^(0.00)
Astrid Peth - extendedart	Creature	$0.00 ^(0.00)
Atraxi Warden	Creature	$0.00 ^(0.00)

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