Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

, : Search your library for a Mercenary permanent card with mana value 5 or less, put it onto the battlefield, then shuffle.

Enchant creature

Enchanted creature has vigilance and "At the beginning of your end step, create a 1/1 white Human creature token."

Whenever a creature you control enters, put a +1/+1 counter on each creature you control.

White legendary creatures you control have "bands with other legendary creatures." (Any legendary creatures can attack in a band as long as at least one has "bands with other legendary creatures." Bands are blocked as a group. If at least two legendary creatures you control, one of which has "bands with other legendary creatures," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Enchant creature

Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card."

If Catlike Curiosity would be put into a graveyard from anywhere, exile it instead.

Spree (Choose one or more additional costs.)

+ — Caught in the Crossfire deals 2 damage to each outlaw creature. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)

+ — Caught in the Crossfire deals 2 damage to each non-outlaw creature.

Adamant — If at least three black mana was spent to cast this spell, mill four cards.

You may choose a creature card in your graveyard. If you do, return it to the battlefield with an additional +1/+1 counter on it.

, Sacrifice Caustic Caterpillar: Destroy target artifact or enchantment.

When Caustic Hound dies, each player loses 4 life.

Enchant land

Enchanted land has ": Target player loses 3 life."

All Slivers have ", Sacrifice this permanent: This permanent deals 1 damage to any target."

All Slivers have ", Sacrifice this permanent: Prevent the next 1 damage that would be dealt to target player, planeswalker, or Sliver creature this turn."

Flying

When Cavalier of Gales enters, draw three cards, then put two cards from your hand on top of your library in any order.

When Cavalier of Gales dies, shuffle it into its owner's library, then scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

When Cavalry Drillmaster enters, target creature gets +2/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Flying

Whenever Cavalry Pegasus attacks, each attacking Human gains flying until end of turn.

Enchant creature

Enchanted creature gets +1/+1 and has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

When Cavern Stomper enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

: Cavern Stomper can't be blocked by creatures with power 2 or less this turn.

: Add .

: Cavernous Maw becomes a 3/3 Elemental creature until end of turn. It's still a Cave land. Activate only if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater.

Trample

When Caves of Chaos Adventurer enters, you take the initiative.

Whenever Caves of Chaos Adventurer attacks, exile the top card of your library. If you've completed a dungeon, you may play that card this turn without paying its mana cost. Otherwise, you may play that card this turn.

Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Other nontoken creatures you control have fabricate 1.

, : Choose one —

• Populate.

• Proliferate.

Exile up to two target cards from a single graveyard. Target player gains 2 life and draws a card.

Whenever you activate an ability of an Elemental, Ceaseless Searblades gets +1/+0 until end of turn.

Search your library for up to X basic land cards, where X is the number of different powers among creatures you control. Put those cards onto the battlefield tapped, then shuffle.

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Flying, first strike

Enchanted creature gets +4/+4 and has flying and first strike.

Celestial Colonnade enters tapped.

: Add or .

: Until end of turn, Celestial Colonnade becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.

Flash

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

Flying

Other white creatures get +1/+1.

, : Tap target creature. Activate only if you control a creature with flying.

At the beginning of each upkeep, you gain 3 life.

For each different power among creatures on the battlefield, choose a creature with that power. Destroy each creature not chosen this way.

Enchant creature

Enchanted creature gets +3/+3.

Whenever enchanted creature deals combat damage to a player, double its controller's life total.

, : Add one mana of any color.

Flying

When Celestial Regulator enters, choose target creature you don't control and tap it. If you control a creature with a counter on it, the chosen creature doesn't untap during its controller's next untap step.

Whenever you gain life, put a +1/+1 counter on Celestial Unicorn.

When CARDNAME enters the battlefield, create two 1/1 black Insect creature tokens.

Whenever CARDNAME attacks, you may sacrifice an Insect. When you do, curse defending player. (Create a black Aura Curse enchantment token that's attached to that player. It has enchant player and "At the beginning of your upkeep, you lose 1 life.")

If it's neither day nor night, it becomes day as Celestus Sanctifier enters.

Whenever day becomes night or night becomes day, look at the top two cards of your library. Put one of them into your graveyard.

Menace

When Cemetery Desecrator enters or dies, exile another card from a graveyard. When you do, choose one —

• Remove X counters from target permanent, where X is the mana value of the exiled card.

• Target creature an opponent controls gets -X/-X until end of turn, where X is the mana value of the exiled card.

Whenever Cenn's Heir attacks, it gets +1/+1 until end of turn for each other attacking Kithkin.

When Cenote Scout enters, it 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.)

As Censorship enters, choose a word.

Whenever a player says the chosen word, Censorship deals 2 damage to that player.

( can be paid with either or .)

When Centaur Safeguard dies, you may gain 3 life.

, Sacrifice Centaur's Herald: Create a 3/3 green Centaur creature token.

When you unlock this door, search your library for a Room card that doesn't have the same name as a Room you control, reveal it, put it into your hand, then shuffle.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

: Add . Cephalid Coliseum deals 1 damage to you.

Threshold — , , Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.

Whenever Cephalid Illusionist becomes the target of a spell or ability, mill three cards.

, : Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

Threshold — As long as seven or more cards are in your graveyard, Cephalid Sage has "When Cephalid Sage enters, draw three cards, then discard two cards."

Whenever a player casts a spell, counter that spell unless that player pays , where X is the number of cards in all graveyards with the same name as the spell.

Flying

Cephalopod Sentry's power is equal to the number of artifacts you control.

Counter target colorless spell.

Target creature becomes blue until end of turn. Untap that creature.

Draw a card.

, : Target creature gets +2/+0 until end of turn.

, : Add one mana of any color.