When Contagion Engine enters, 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.)

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 and it wasn't cast, exile it instead.

(: Add or .)

Contaminated Aquifer enters tapped.

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

: Add .

, Sacrifice Contaminated Landscape: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle.

Cycling (, Discard this card: 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.)

Destroy target creature. Create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Enchant red or green creature

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

Dynastic Command Node — As long as you control your commander, activated abilities of cards in your graveyard cost less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana.

Translocation Protocols — , : Mill three cards.

, : Convulsing Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.

Enchanted creature can't block.

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.

Tap one or two target untapped creatures you control. They each deal damage equal to their power to target creature an opponent controls.

, : Corrupting Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.

Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

If a permanent you control would be put into a graveyard from the battlefield this turn, exile it instead. Return it to the battlefield under its owner's control at the beginning of the next end step.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Counter target spell. You may cast a creature, instant, sorcery, or planeswalker spell from your graveyard with mana value less than or equal to that spell's mana value without paying its mana cost.

Put a +1/+1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Court of Cunning enters, you become the monarch.

At the beginning of your upkeep, any number of target players each mill two cards. If you're the monarch, each of those players mills ten cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)

Reveal the top three cards of your library. Target opponent may choose to put those cards into your hand. If they don't, put those cards into your graveyard and draw five cards.

Creatures your opponents control get -1/-1 until end of turn.

Vanishing 3 (This enchantment enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

When Crack in Time enters and at the beginning of your first main phase, exile target creature an opponent controls until Crack in Time leaves the battlefield.

Crackling Doom deals 2 damage to each opponent. Each opponent sacrifices a creature with the greatest power among creatures that player controls.

Enchant land you control

Enchanted land is a 3/3 red Spirit creature with haste. It's still a land.

If enchanted land would be destroyed, instead sacrifice Crackling Emergence and that land gains indestructible until end of turn.

Tap an untapped Gate you control: Crackling Perimeter deals 1 damage to each opponent.

, Sacrifice Crackling Triton: It deals 2 damage to any target.

Target creature with flying loses flying until end of turn. Crash Landing deals damage to that creature equal to the number of Forests you control.

Trample

, Discard a card: Crashing Centaur gains trample until end of turn.

Threshold — As long as seven or more cards are in your graveyard, Crashing Centaur gets +2/+2 and has shroud. (It can't be the target of spells or abilities.)

Suspend 4— (Rather than cast this card from your hand, pay and exile it with four 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.)

Create two 4/4 green Rhino creature tokens with trample.

Enchant creature you control

Enchanted creature gets +3/+2, has haste, and attacks each combat if able.

: Return Craving of Yeenoghu from your graveyard to the battlefield attached to target creature you control. Craving of Yeenoghu perpetually gains "Enchanted creature gets -1/-1." Activate only as a sorcery.

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

When Crawling Chorus dies, create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This creature can't block."

At the beginning of your upkeep, you may mill two cards. (You may put the top two cards of your library into your graveyard.)

Whenever one or more creature cards are put into your graveyard from anywhere during your turn, create a 1/1 green Insect creature token. This ability triggers only once each turn.

Crazed Goblin attacks each combat if able.

Creeping Chill deals 3 damage to each opponent and you gain 3 life.

When Creeping Chill is put into your graveyard from your library, you may exile it. If you do, Creeping Chill deals 3 damage to each opponent and you gain 3 life.

At the beginning of your upkeep, each player discards a card. Each opponent who discarded a card that shares a card type with the card you discarded loses 3 life. (Players reveal the discarded cards simultaneously.)

Destroy target artifact, enchantment, or land.

Choose a permanent type. Return all cards of the chosen type from your graveyard to your hand.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Other Elementals you control get +1/+0.

: Creeping Trailblazer gets +1/+1 until end of turn for each Elemental you control.

Haste

Crew Captain has indestructible as long as it entered this turn.

Enchant creature

Enchanted creature gets -1/-1 and can't block.

Target creature gets -2/-2 until end of turn.

Flashback—, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Create a token that's a copy of target non-Frog creature, except it's a 1/1 green Frog.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Haste

When Crocodile of the Crossing enters, put a -1/-1 counter on target creature you control.

Creatures with flying get -2/-0.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Crowd of Cinders's power and toughness are each equal to the number of black permanents you control.

Draw four cards. You lose half your life, rounded up.

Strive — This spell costs more to cast for each target beyond the first.

Any number of target creatures each get +1/+0 and gain lifelink until end of turn. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it.

Crumbling Necropolis enters tapped.

: Add , , or .

Crumbling Vestige enters tapped.

When Crumbling Vestige enters, add one mana of any color.

: Add . ( represents colorless mana.)