Sliver creatures you control have "When this creature enters the battlefield, you may exile target creature an opponent controls until this creature leaves the battlefield."

When Consulate Surveillance enters the battlefield, you get (four energy counters).

Pay : Prevent all damage that would be dealt to you this turn by a source of your choice.

When Consul's Shieldguard enters the battlefield, you get (two energy counters).

Whenever Consul's Shieldguard attacks, you may pay . If you do, another target attacking creature gains indestructible until end of turn.

Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards.

Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

Exile target creature. If it had mana value 3 or less, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Choose one —

• Consuming Bonfire deals 4 damage to target non-Elemental creature.

• Consuming Bonfire deals 7 damage to target Treefolk creature.

Enchant creature

Enchanted creature gets +3/+3 and has "At the beginning of your upkeep, put a -1/-1 counter on this creature."

At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

Each player chooses a nonland permanent they control. Return all nonland permanents not chosen this way to their owners' hands. Then you draw a card for each opponent who has more cards in their hand than you.

Return target creature to its owner's hand.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

You may pay 1 life and exile a black card from your hand rather than pay this spell's mana cost.

Distribute two -2/-1 counters among one or two target creatures.

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls.

, : Proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

When Contagious Vorrac enters the battlefield, look at the top four cards of your library. You may reveal a land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you discard a card, you may exile that card from your graveyard. If you do, you may play that card this turn.

Flash

If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.

(: Add or .)

Contaminated Aquifer enters the battlefield tapped.

Draw X cards, then you get half X rad counters, rounded up.

At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature.

If a land is tapped for mana, it produces instead of any other type and amount.

Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Draw a card.

Surveil 5. (Look at the top five cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Contortionist Troupe enters the battlefield with X +1/+1 counters on it.

Coven — At the beginning of your end step, if you control three or more creatures with different powers, put a +1/+1 counter on target creature you control.

Exile target creature, then roll a d20.

1–9 | Its controller creates a 4/4 green Ox creature token.

10–19 | Its controller creates a 2/2 green Boar creature token.

20 | Its controller creates a 0/1 white Goat creature token.

Counter target spell.

Draw a card.

Enchant creature

You control enchanted creature.

Enchant red or green creature

Enchanted creature doesn't untap during its controller's untap step.

Enchant creature

When Convenient Target enters the battlefield, suspect enchanted creature. (It has menace and can't block.)

Enchanted creature gets +1/+1.

: Return Convenient Target from your graveyard to your hand.

At the beginning of your upkeep, sacrifice Conversion unless you pay .

All Mountains are Plains.

At the beginning of each upkeep, if no spells were cast last turn, transform Convicted Killer.

Enchant land

As Convincing Mirage enters the battlefield, choose a basic land type.

Enchanted land is the chosen type.

Enchant creature

Enchanted creature has banding. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Choose a creature type. Coordinated Barrage deals damage to target attacking or blocking creature equal to the number of permanents you control of the chosen type.

Copperline Gorge enters the battlefield tapped unless you control two or fewer other lands.

: Add or .

Defender (This creature can't attack.)

When Coral Barrier enters the battlefield, create a 1/1 blue Squid creature token with islandwalk. (It can't be blocked as long as defending player controls an Island.)

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Coral Trickster is turned face up, you may tap or untap target permanent.

: Target creature can't be blocked this turn.

Haste

, : Add . Spend this mana only to cast instant and/or sorcery spells.

When Cormela, Glamour Thief dies, return up to one target instant or sorcery card from your graveyard to your hand.

Target creature you control gains myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token that's a copy of that creature that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

When Corpse Connoisseur enters the battlefield, you may search your library for a creature card, put that card into your graveyard, then shuffle.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

At the beginning of your upkeep, put a rust counter on each artifact target opponent controls. Then destroy each artifact with mana value less than or equal to the number of rust counters on it. Artifacts destroyed this way can't be regenerated.

When Corrosion leaves the battlefield, remove all rust counters from all permanents.

Black creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.)

When Corrupt Court Official enters the battlefield, target opponent discards a card.

Enchant creature

You control enchanted creature.

Enchanted creature has infect. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Enchant land

Enchanted land is a 3/3 black Ooze creature. It's still a land.

When enchanted land dies, return that card to its owner's hand.

When Corruption of Towashi enters the battlefield, incubate 4. (Create an Incubator token with four +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Whenever a permanent you control transforms or a permanent enters the battlefield under your control transformed, you may draw a card. Do this only once each turn.

: Target Goblin, Orc, or Pirate can't be blocked this turn.

Whenever Corsairs of Umbar deals combat damage to a player, amass Orcs 3. (Put three +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Landfall — Whenever a land enters the battlefield under your control, you may have Cosi's Ravager deal 1 damage to target player or planeswalker.

Draw cards equal to the number of instant and sorcery cards in your graveyard.

Target creature you control deals damage equal to its power to another target creature, planeswalker, or battle.

Trample

At the beginning of your upkeep, sacrifice Cosmic Larva unless you sacrifice two lands.