Automated systems at the Tolarian Academy sort new acquisitions for optimal use, determining which should be studied, eaten, or sold.

Academy Manufactor

If you would create a Clue, Food, or Treasure token, instead create one of each.

Creating a Clue token this way isn't the same thing as investigating. Notably, an ability that triggers whenever you investigate won't trigger because you created a Clue token due to this replacement effect. If the original token creation was because you investigated once, those abilities will still each trigger once, no matter how many Clue tokens you end up creating.

If you control eighteen Academy Manufactors (I don't know, you figure it out) and would create some number of Clue, Food, or Treasure tokens, you will instead create 129,140,163 times that many Clue tokens, 129,140,163 times that many Food tokens, and 129,140,163 times that many Treasure tokens.

If you control one Academy Manufactor and would create some number of Clue, Food, or Treasure tokens, you will instead create that many Clue tokens, that many Food tokens, and that many Treasure tokens.

If you control two Academy Manufactors and would create some number of Clue, Food, or Treasure tokens, you will instead create three times that many Clue tokens, three times that many Food tokens, and three times that many Treasure tokens.

Oriq agents stick to the dark corners of Arcavios, unseen yet ever-present.

Access Tunnel

{T}: Add {C}.
{3}, {T}: Target creature with power 3 or less can't be blocked this turn.

If the target creature's power is greater than 3 as Access Tunnel's second ability tries to resolve, the ability doesn't resolve. However, if instead the creature's power is raised above 3 after the ability resolves, it still can't be blocked that turn.

Once a creature with power 3 or less has been blocked, Access Tunnel's second ability won't cause it to become unblocked.

"I don't know what that is or who it belongs to, but it's shiny and I want it."

Aetherborn Marauder

Flying, lifelink
When Aetherborn Marauder enters the battlefield, move any number of +1/+1 counters from other permanents you control onto Aetherborn Marauder.

If a creature has been dealt damage, that damage remains marked on it until the cleanup step. If Aetherborn Marauder takes counters from a creature that has been dealt damage, that creature will be destroyed if the damage is now lethal.

You choose which counters to move as Aetherborn Marauder's triggered ability resolves.

You may choose to move zero +1/+1 counters.

You may move +1/+1 counters from any number of other permanents you control, not just from one.

Flying, lifelink
When Aetherborn Marauder enters, move any number of +1/+1 counters from other permanents you control onto Aetherborn Marauder.

When the ruins awakened, so did their defenses.

Ancient Greenwarden

Reach
You may play lands from your graveyard.
If a land entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

An ability that triggers whenever you play a land won't trigger an additional time.

Ancient Greenwarden allows you to play a modal double-faced card's land face, but not a nonland face.

Ancient Greenwarden doesn't allow you to activate abilities (such as cycling) of land cards in your graveyard.

Ancient Greenwarden doesn't change the times when you can play those lands. You can still play only one land per turn, and only during your main phase when you have priority and the stack is empty.

Ancient Greenwarden's effect doesn't copy the triggered ability; it causes the ability to trigger twice. Any choices made as you put the ability onto the stack, such as modes and targets, are made separately for each instance of the ability. Any choices made on resolution, such as whether to put counters on a permanent, are also made individually.

Ancient Greenwarden's third ability affects a land's own enters-the-battlefield triggered abilities as well as other triggered abilities that trigger when that land enters the battlefield, such as landfall abilities. Such triggered abilities start with "when" or "whenever."

If a land entering the battlefield at the same time as Ancient Greenwarden (including Ancient Greenwarden itself if an effect causes it to be a land) causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

If you control two Ancient Greenwardens, a land entering the battlefield causes abilities to trigger three times, not four. A third Ancient Greenwarden causes abilities to trigger four times, a fourth causes abilities to trigger five times, and so on.

Look at each permanent as it exists on the battlefield, taking into account continuous effects, to determine whether any triggered abilities will trigger multiple times. For example, if you control Ashaya, Soul of the Wild, a nontoken creature entering the battlefield will cause any appropriate abilities to trigger an additional time.

Replacement effects are unaffected by Ancient Greenwarden's third ability. This includes any abilities that apply "as [this land] enters the battlefield" and any ability that says the land enters the battlefield with counters.

The trigger event doesn't have to specifically refer to "lands." For example, an ability that triggers "whenever a creature enters the battlefield under your control" would trigger twice if the entering land is also a creature.

Reach
You may play lands from your graveyard.
If a land entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Angel of Indemnity

Flying, lifelink
When Angel of Indemnity enters the battlefield, return target permanent card with mana value 4 or less from your graveyard to the battlefield.
Encore {6}{W}{W} ({6}{W}{W}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

A permanent card is an artifact, battle, creature, enchantment, land, or planeswalker card.

Each token must attack the appropriate player if able.

Exiling the card with encore is a cost to activate the ability. Once you announce that you’re activating it, no player may take actions until you’ve finished. They can’t try to remove the card from your graveyard to stop you from paying the cost.

If an effect stops a token from attacking a specific player, that token can attack any player, planeswalker, or battle, or not attack at all. If the effect stops the token from attacking a specific player unless a cost is paid, you don’t have to pay that cost unless you want to attack that player.

If one of the tokens can’t attack for any reason (such as being tapped), then it doesn’t attack. If there’s a cost associated with having it attack, you aren’t forced to pay that cost, so it doesn’t have to attack in that case either.

If one of the tokens somehow is under another player’s control as the delayed triggered ability resolves, you can’t sacrifice that token. It remains on the battlefield indefinitely, even if you regain control of it later.

If the mana cost of a card in your graveyard includes {X}, X is 0 for the purpose of determining its mana value.

If you return an Aura this way, you choose what the Aura will enchant just before it enters the battlefield. An Aura returning to the battlefield this way doesn’t target the player or permanent it will enchant, so permanents or players with hexproof may be chosen; however, the chosen recipient must be able to legally be enchanted by the Aura, so a player or permanent with protection from one of the Aura’s qualities can’t be chosen this way. If there’s nothing legal for the Aura to enchant, it stays in the graveyard.

Opponents who have left the game aren’t counted when determining how many tokens to create.

The tokens copy only what’s on the original card. Effects that modified that creature when it was previously on the battlefield won’t be copied.

Flying, lifelink
When Angel of Indemnity enters, return target permanent card with mana value 4 or less from your graveyard to the battlefield.
Encore {6}{W}{W} ({6}{W}{W}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Flying, lifelink
When Angel of Indemnity enters the battlefield, return target permanent card with mana value 4 or less from your graveyard to the battlefield.
Encore {6}{W}{W}

Angel of the Ruins

Flying
When Angel of the Ruins enters the battlefield, exile up to two target artifacts and/or enchantments.
Plainscycling {2} ({2}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Flying
When Angel of the Ruins enters, exile up to two target artifacts and/or enchantments.
Plainscycling {2} ({2}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Angelic Sell-Sword

Flying, vigilance
Whenever Angelic Sell-Sword or another nontoken creature enters the battlefield under your control, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."
Whenever Angelic Sell-Sword attacks, if its power is 6 or greater, draw a card.

Flying, vigilance
Whenever Angelic Sell-Sword or another nontoken creature you control enters, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."
Whenever Angelic Sell-Sword attacks, if its power is 6 or greater, draw a card.

Captain Angrath cares less about treasure than mayhem. If he can't leave Ixalan, he'll burn the plane down.

Angrath's Marauders

If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

If a creature with trample you control would deal combat damage to a blocking creature while you control Angrath's Marauders, you must assign its unmodified damage. For example, a 3/3 creature with trample blocked by a 2/2 creature can have at most 1 damage assigned to the defending player. It will then deal 4 damage to the blocking creature and 2 damage to the defending player.

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

If you control a second Angrath's Marauders, damage dealt by sources you control will be multiplied by 4. If you control a third, it will be multiplied by 8, and so on.

Arcane Bombardment

Whenever you cast your first instant or sorcery spell each turn, exile an instant or sorcery card at random from your graveyard. Then copy each card exiled with Arcane Bombardment. You may cast any number of the copies without paying their mana costs.

If Arcane Bombardment leaves the battlefield, the exiled cards remain in exile. If it returns to the battlefield or you play another copy of it, you won't get to cast copies of the cards previously exiled.

If you cast a spell with {X} in its cost without paying its mana cost, you must choose 0 for X.

If you've already cast an instant or sorcery spell the turn that Arcane Bombardment enters the battlefield, it won't trigger until you cast an instant or sorcery spell on a later turn.

The spell that caused Arcane Bombardment's ability to trigger is normally still on the stack while that ability resolves. That spell won't be among the cards in your graveyard when you exile an instant or sorcery from it at random.

You cast the desired copies as the triggered ability resolves. You don't get to cast them later in the turn. You choose the order of copies as you cast them.

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

The controller of the countered spell doesn't choose how many cards to draw until the relevant ability resolves. The player may draw 0, 1, or 2 cards. They choose the number before drawing any cards.

Arcane Heist

You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost. If that spell would be put into their graveyard, exile it instead.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

If a creature with an encoded card deals combat damage to more than one player simultaneously (perhaps because some of the combat damage was redirected), the triggered ability will trigger once for each player it deals combat damage to. Each ability will create a copy of the exiled card and allow you to cast it.

If another player gains control of the creature, that player will control the triggered ability. That player will create a copy of the encoded card and may cast it.

If the creature leaves the battlefield, the exiled card will no longer be encoded on any creature. It will stay exiled.

If the spell with cipher doesn’t resolve, none of its effects will happen, including cipher. The card will go to its owner’s graveyard and won’t be encoded on a creature.

If the spell you cast 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 additional costs, such as kicker costs. If the spell has any mandatory additional costs, those must be paid to cast the spell.

If you choose not to cast the copy, or you can’t cast it (perhaps because there are no legal targets available), the copy will cease to exist the next time state-based actions are performed. You won’t get a chance to cast the copy at a later time.

The copy of the card with cipher is created in and cast from exile.

The exiled card with cipher grants a triggered ability to the creature it’s encoded on. If that creature loses that ability and subsequently deals combat damage to a player, the triggered ability won’t trigger. However, the exiled card will continue to be encoded on that creature.

The spell with cipher is encoded on the creature as part of that spell’s resolution, just after the spell’s other effects. That card goes directly from the stack to exile. It never goes to the graveyard.

You can choose only a creature to encode the card onto.

You cast the copy of the card with cipher during the resolution of the triggered ability. Ignore timing restrictions based on the card’s type.

You choose the creature as the spell resolves. The cipher ability doesn’t target that creature.

You choose whether to cast the target instant or sorcery card as Arcane Heist resolves. If you do, you do so as part of the resolution of Arcane Heist. You can’t wait to cast it later in the turn. Timing restrictions based on the card’s types are ignored.

You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost. If that spell would be put into their graveyard, exile it instead.
Cipher

It started as a mere drop of water. The Magic Mirror crystallized it into much more.

Arcane Signet

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

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}.

Some emeritus professors return from their wanderings periodically to share tales of the mystical wonders of Arcavios.

Archmage Emeritus

Magecraft — Whenever you cast or copy an instant or sorcery spell, draw a card.

 Each magecraft ability has a different effect, although they all have the same trigger condition, whenever you cast or copy an instant or sorcery spell.

 For example, if you control Archmage Emeritus and cast an instant or sorcery spell, Archmage Emeritus's magecraft ability will trigger and you will draw a card.

 If an effect creates a copy of an instant or sorcery spell, this will also cause the magecraft ability to trigger.

 If an effect creates multiple copies of an instant or sorcery spell, magecraft abilities trigger once for each copy created by the effect.

 Some effects instruct you to copy an instant or sorcery card in a zone other than the stack. These copies do not cause magecraft abilities to trigger. However, most effects that do this also allow you to cast the copy, and casting the copy will cause magecraft abilities to trigger.

Avenger of Zendikar

When Avenger of Zendikar enters the battlefield, create a 0/1 green Plant creature token for each land you control.
Landfall — Whenever a land enters the battlefield under your control, you may put a +1/+1 counter on each Plant creature you control.

The landfall ability triggers whenever a land enters under your control for any reason. It triggers whenever you play a land, as well as whenever a spell or ability (such as Rampant Growth) causes you to put a land onto the battlefield under your control. It will even trigger when a spell or ability causes another player to put a land onto the battlefield under your control (as can happen with Yavimaya Dryad's ability, for example).

When a land enters under your control, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one that resolves.

When Avenger of Zendikar enters, create a 0/1 green Plant creature token for each land you control.
Landfall — Whenever a land you control enters, you may put a +1/+1 counter on each Plant creature you control.

"Well, there's a good day's work ruined."
—Erin Nath, Omenport gravedigger

Back in Town

Return X target outlaw creature cards from your graveyard to the battlefield. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)

A card, spell, or permanent is an outlaw if it has the Assassin, Mercenary, Pirate, Rogue, or Warlock creature type. It doesn’t matter if it has more than one of those creature types; as long as it has at least one, it’s an outlaw.

If an ability refers to an outlaw or whether a player controls an outlaw, it’s referring only to permanents with one or more of the creature types specified above. Notably, it’s not referring to any spell or card not on the battlefield. However, other abilities may refer to an “outlaw spell” or “outlaw card” in a zone other than the battlefield. Those abilities refer to spells and cards with one or more of the specified creature types.

Outlaw is not a creature type. If an effect asks you to choose a creature type, you can’t choose outlaw.

Return X target outlaw creature cards from your graveyard to the battlefield.

Baleful Mastery

You may pay {1}{B} rather than pay this spell's mana cost.
If the {1}{B} cost was paid, an opponent draws a card.
Exile target creature or planeswalker.

 If an effect increases or decreases the cost of spells you cast, that cost increase or decrease is applied to the alternative cost you chose to pay. In that case, the cost was still paid for the purposes of the effect, even if you paid more or less for it when it was cast.

 If you choose to pay one alternative cost, you can't pay any other alternative costs. For example, if an effect lets you cast a "Mastery" spell "without paying its mana cost," you can't also choose to pay its given alternative cost.

 If you copy a "Mastery" spell and the alternative cost was paid, the copy will resolve as though the cost was paid.

 In a multiplayer game, you choose which opponent takes the prescribed action as the spell resolves.

 The mana value of a spell on the stack is determined by its mana cost, not any alternative costs you used to pay for it.

Its beak rends flesh and bone, exposing the tender marrow of dream.

Baleful Strix

Flying, deathtouch
When Baleful Strix enters the battlefield, draw a card.

Flying, deathtouch
When Baleful Strix enters, draw a card.

Baral's Expertise

Return up to three target artifacts and/or creatures to their owners' hands.
You may cast a spell with mana value 4 or less from your hand without paying its mana cost.

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.

Any triggered abilities that trigger while performing the Expertise spell's first effect won't be put onto the stack until after you're done casting your free spell. They're put onto the stack at the same time as any abilities that triggered while casting that spell regardless of the order in which those abilities triggered.

Effects that allow you to "cast" a card don't allow you to play a land card.

If the Expertise spell you cast has any targets, and those targets become illegal before the spell resolves, the spell doesn't resolve and none of its effects happen. You won't get to cast a free spell.

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

The card that you cast may be an artifact or creature that was returned to your hand by this spell.

While you're casting your free spell, the Expertise spell is still on the stack. It will be put into its owner's graveyard after the free spell is cast. The free spell can't target the Expertise card in your graveyard. It can target the Expertise spell on the stack, but the Expertise spell will become an illegal target before the free spell resolves.

The mana value of a split card is determined by the combined mana cost of its two halves. If an expertise spell allows you to cast a split card, you may cast either half or, if that split card has fuse, both halves.

"As Terisiare's mines ran dry, scrap metal became increasingly plentiful."
—*The Antiquities War*

Battlefield Forge

{T}: Add {C}.
{T}: Add {R} or {W}. Battlefield Forge deals 1 damage to you.

Like most lands, each land in this cycle is colorless. The damage dealt to you is dealt by a colorless source.

The damage dealt to you is part of the second mana ability. It doesn't use the stack and can't be responded to.

"Unimaginable riches? I assure you, I have a *vivid* imagination."

Big Score

As an additional cost to cast this spell, discard a card.
Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

The peace summit proved the grudge between Urza and Mishra could end only in blood.

Bitter Reunion

When Bitter Reunion enters the battlefield, you may discard a card. If you do, draw two cards.
{1}, Sacrifice Bitter Reunion: Creatures you control gain haste until end of turn.

When Bitter Reunion enters, you may discard a card. If you do, draw two cards.
{1}, Sacrifice Bitter Reunion: Creatures you control gain haste until end of turn.

Where ambition meets industry, passion is poisoned by greed.

Blackcleave Cliffs

Blackcleave Cliffs enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {B} or {R}.

If one of these lands enters the battlefield at the same time as one or more other lands (due to Oblivion Sower or Warp World, perhaps), it doesn't take those lands into consideration when determining how many other lands you control.

If one of these lands enters the battlefield under your control and you control zero, one, or two other lands, it enters the battlefield untapped. If you control three or more other lands, it enters the battlefield tapped.

Blackcleave Cliffs enters tapped unless you control two or fewer other lands.
{T}: Add {B} or {R}.

The new model has improved aerodynamics but introduced a few glitches in the targeting system.

Bladegriff Prototype

Flying
Whenever Bladegriff Prototype deals combat damage to a player, destroy target nonland permanent of that player's choice that one of your opponents controls.

Even though the player who was dealt damage chooses the target for Bladegriff Prototype's ability, you are the controller of the ability.

If an opponent dealt damage by Bladegriff Prototype leaves the game before the triggered ability goes on the stack (most likely because that player's life total was reduced to 0 or less in combat), you choose another opponent to choose the target permanent.

Bloodthirsty Adversary

Haste
When Bloodthirsty Adversary enters the battlefield, you may pay {2}{R} any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Bloodthirsty Adversary, then exile up to that many target instant and/or sorcery cards with mana value 3 or less from your graveyard and copy them. You may cast any number of the copies without paying their mana costs.

After you pay the {2}{R} cost one or more times, a second ability triggers and you choose the targets for it. Players may respond to the new ability at that point. As that ability resolves, Bloodthirsty Adversary gets its counters and the target cards are exiled.

Copies cast this way are cast during the resolution of the ability. You don't have to follow normal timing requirements and you can't wait and cast them later.

Whether or not you cast the copies this way, the original cards will remain in exile.

Haste
When Bloodthirsty Adversary enters, you may pay {2}{R} any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Bloodthirsty Adversary, then exile up to that many target instant and/or sorcery cards with mana value 3 or less from your graveyard and copy them. You may cast any number of the copies without paying their mana costs.

Bojuka Bog

Bojuka Bog enters the battlefield tapped.
When Bojuka Bog enters the battlefield, exile target player's graveyard.
{T}: Add {B}.

Bojuka Bog enters tapped.
When Bojuka Bog enters, exile target player's graveyard.
{T}: Add {B}.

There is a sanctuary that reveals itself only to those graced by the *eludha*—the mystical connection between bonder and monster.

Bonders' Enclave

{T}: Add {C}.
{3}, {T}: Draw a card. Activate only if you control a creature with power 4 or greater.

Once you announce that you're activating the last ability of Bonders' Enclave, no player may take actions until you've finished activating it. Notably, opponents can't try to change whether you control a creature with power 4 or greater.

Once you've activated the last ability of Bonders' Enclave, it doesn't check again at any point whether you control a creature with power 4 or greater.

Boros Charm

Choose one —
• Boros Charm deals 4 damage to target player or planeswalker.
• Permanents you control gain indestructible until end of turn.
• Target creature gains double strike until end of turn.

If you choose the second mode, permanents that come under your control later in the turn will not have indestructible.

Planeswalkers with indestructible will still have loyalty counters removed from them as they are dealt damage. If planeswalker with indestructible has no loyalty counters, it will still be put into its owner's graveyard, as the rule that does this doesn't destroy the planeswalker.

Bounty Board

{T}: Add one mana of any color.
{1}, {T}: Put a bounty counter on target creature. Activate only as a sorcery.
Whenever a creature with a bounty counter on it dies, each of its controller's opponents draws a card and gains 2 life.

Bounty Board’s last ability looks for any bounty counter on any creature, not just one from that Bounty Board. For example, say players A and B each control a Bounty Board and player C controls a creature with a bounty counter on it (no matter how that bounty counter got there). When that creature dies, the ability each Bounty Board will trigger. Each of those abilities will cause players A and B to draw a card and gain 2 life, for a total of two cards and 4 life for each of them. Player C is left only with a creature to mourn and revenge on their mind.

Brainstealer Dragon

Flying
At the beginning of your end step, exile the top card of each opponent's library. You may play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any color to cast it.
Whenever a nonland permanent an opponent owns enters the battlefield under your control, they lose life equal to its mana value.

Breena, the Demagogue

Flying
Whenever a player attacks one of your opponents, if that opponent has more life than another of your opponents, that attacking player draws a card and you put two +1/+1 counters on a creature you control.

Breena's triggered ability will trigger even if you control no creatures.

If the attacking player is one of your opponents and has less life than the player being attacked, then the condition is satisfied.

You choose which creature to put +1/+1 counters on as the ability is resolving. Once you make the choice, no player may take actions until the counters are placed.

Cactus Preserve

Cactus Preserve enters the battlefield tapped.
{T}: Add one mana of any type that a land you control could produce.
{3}: Until end of turn, Cactus Preserve becomes an X/X green Plant creature with reach, where X is the greatest mana value among your commanders. It's still a land.

Any change to a land’s type or abilities gained by a land can affect the types of mana a land can produce.

Cactus Preserve doesn’t care about any restrictions or riders your lands put on the mana they produce, such as that of Bucolic Ranch or the ability granted by Discreet Retreat. It just produces one mana of the appropriate type, with no restrictions or riders.

Cactus Preserve’s second ability checks the effects of all mana-producing abilities of lands you control, but it doesn’t check their costs or legality. For example, Spire of Industry says “{T}, Pay 1 life: Add one mana of any color. Activate only if you control an artifact.” If you control Spire of Industry and Cactus Preserve, you can tap Cactus Preserve for any color of mana. It doesn’t matter whether you control an artifact, whether you can pay 1 life, or whether Spire of Industry is untapped.

Desert is a land subtype with no special meaning. It doesn’t grant the land an intrinsic mana ability. Other cards may care about which lands are Deserts.

If Cactus Preserve becomes a creature but you haven’t controlled it continuously since your most recent turn began, you won’t be able to activate its mana ability or attack with it that turn.

It doesn’t matter where your commander is (or commanders are, if you have more than one because of the partner ability or similar). The value of X will be calculated using your commander’s current characteristics. (Mana value typically doesn’t change, but your commander may become a copy of something else.)

The types of mana are white, blue, black, red, green, and colorless.

Cactus Preserve enters tapped.
{T}: Add one mana of any type that a land you control could produce.
{3}: Until end of turn, Cactus Preserve becomes an X/X green Plant creature with reach, where X is the greatest mana value among your commanders. It's still a land.

Canyon Slough

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

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

Captain Lannery Storm

Haste
Whenever Captain Lannery Storm attacks, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
Whenever you sacrifice a Treasure, Captain Lannery Storm gets +1/+0 until end of turn.

Card (343)	Type	^{$82.90 (78.70)} Price
Academy Manufactor	Creature	$1.00 ^(1.00)
Access Tunnel	Land	$0.05 ^(0.05)
Aetherborn Marauder	Creature	$0.00 ^(0.00)
Ancient Greenwarden	Creature	$3.00 ^(3.00)
Angel of Indemnity	Creature	$0.00 ^(0.00)
Angel of Indemnity - extendedart	Creature	$0.00 ^(0.00)
Angel of the Ruins	Creature	$0.00 ^(0.00)
Angelic Sell-Sword	Creature	$0.00 ^(0.00)
Angelic Sell-Sword - extendedart	Creature	$0.00 ^(0.00)
Angrath's Marauders	Creature	$0.08 ^(0.00)
Arcane Bombardment	Enchantment	$0.50 ^(0.50)
Arcane Denial	Instant	$0.00 ^(0.00)
Arcane Heist	Sorcery	$0.00 ^(0.00)
Arcane Heist - extendedart	Sorcery	$0.00 ^(0.00)
Arcane Signet	Artifact	$0.15 ^(0.15)
Archmage Emeritus	Creature	$0.00 ^(0.00)
Avenger of Zendikar	Creature	$0.25 ^(0.25)
Back in Town	Sorcery	$0.00 ^(0.00)
Back in Town - extendedart	Sorcery	$0.00 ^(0.00)
Baleful Mastery	Instant	$0.15 ^(0.15)
Baleful Strix	Creature	$0.15 ^(0.15)
Baral's Expertise	Sorcery	$0.00 ^(0.00)
Battlefield Forge	Land	$0.50 ^(0.50)
Big Score	Instant	$0.15 ^(0.15)
Bitter Reunion	Enchantment	$0.02 ^(0.02)
Blackcleave Cliffs	Land	$1.50 ^(1.50)
Bladegriff Prototype	Creature	$0.00 ^(0.00)
Bloodthirsty Adversary	Creature	$0.15 ^(0.15)
Bojuka Bog	Land	$0.75 ^(0.75)
Bonders' Enclave	Land	$0.08 ^(0.08)
Boros Charm	Instant	$0.75 ^(0.75)
Bounty Board	Artifact	$0.00 ^(0.00)
Bounty Board - extendedart	Artifact	$0.00 ^(0.00)
Brainstealer Dragon	Creature	$1.50 ^(1.50)
Breena, the Demagogue	Creature	$0.50 ^(0.50)
Cactus Preserve	Land	$0.00 ^(0.00)
Cactus Preserve - extendedart	Land	$0.00 ^(0.00)
Canyon Slough	Land	$0.00 ^(0.00)
Captain Lannery Storm	Creature	$0.00 ^(0.00)
Captivating Crew	Creature	$0.00 ^(0.00)
Cascade Bluffs	Land	$0.50 ^(0.50)
Cataclysmic Prospecting	Sorcery	$0.00 ^(0.00)
Cataclysmic Prospecting - extendedart	Sorcery	$0.00 ^(0.00)
Caves of Koilos	Land	$0.50 ^(-0.50)
Cazur, Ruthless Stalker	Creature	$0.00 ^(0.00)
Changeling Outcast	Creature	$0.15 ^(0.15)
Chaos Wand	Artifact	$0.00 ^(0.00)
Chaos Warp	Instant	$0.15 ^(0.15)
Charred Graverobber	Creature	$0.00 ^(0.00)
Charred Graverobber - extendedart	Creature	$0.00 ^(0.00)

Outlaws of Thunder Junction Commander