When Circle of the Land Druid enters, you may mill four cards. (You may put the top four cards of your library into your graveyard.)

Natural Recovery — When Circle of the Land Druid dies, return target land card from your graveyard to your hand.

Whenever one or more other nontoken permanents with a name originally printed in the Arabian Nights expansion are on the battlefield, their controllers sacrifice them.

Players can't cast spells or play lands with a name originally printed in the Arabian Nights expansion.

Whenever Clammy Prowler attacks, another target attacking creature can't be blocked this turn.

When Clandestine Meddler enters, suspect up to one other target creature you control. (A suspected creature has menace and can't block.)

Whenever one or more suspected creatures you control attack, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Whenever you attack, target attacking Vampire that isn't a Demon becomes a Demon in addition to its other types. It gains "When this creature dies, draw a card and create a tapped 4/3 white and black Vampire Demon creature token with flying."

Destroy all enchantments.

For each land, destroy that land unless any player pays 1 life.

Destroy all enchantments.

Threshold — If seven or more cards are in your graveyard, instead destroy all enchantments, then return all cards in your graveyard destroyed this way to the battlefield.

Choose one —

• Destroy target Vampire.

• Destroy target enchantment.

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

Draw a card.

Destroy target enchantment.

Cycling (, Discard this card: Draw a card.)

Target creature you control gets +1/+1 until end of turn. It deals damage equal to its power to target creature you don't control.

Target player shuffles their graveyard into their library.

Draw a card.

Sunburst (This enters with a charge counter on it for each color of mana spent to cast it.)

At the beginning of your upkeep, you may gain life equal to the number of charge counters on Clearwater Goblet.

Creatures your opponents control get -1/-1 until end of turn. (Then exile this card. You may cast the creature later from exile.)

Creatures you control gain double strike until end of turn. (They deal both first-strike and regular combat damage.)

Flying, trample

Pay 3 life: Return Cleaving Reaper from your graveyard to your hand. Activate only if you had an Angel or Berserker enter the battlefield under your control this turn.

Sliver creatures you control get +2/+0.

Allies — At the beginning of your end step, put a +1/+1 counter on each of up to two other target legendary creatures.

Betrayal — Whenever a legendary creature with counters on it dies, draw a card for each counter on it. You lose 2 life.

If Clergy of the Holy Nimbus would be destroyed, regenerate it.

: Clergy of the Holy Nimbus can't be regenerated this turn. Only your opponents may activate this ability.

Whenever Cleric of Chill Depths blocks a creature, that creature doesn't untap during its controller's next untap step.

When Cleric of the Forward Order enters, you gain 2 life for each creature you control named Cleric of the Forward Order.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Any number of target nonland permanents you control phase out. (Treat them and anything attached to them as though they don't exist until your next turn.)

Enchant creature

Enchanted creature has "Whenever this creature attacks, tap target creature defending player controls."

If Clever Distraction would be put into a graveyard from anywhere, exile it instead.

Magecraft — Whenever you cast or copy an instant or sorcery spell, Clever Lumimancer gets +2/+2 until end of turn.

When Cloister Gargoyle enters, venture into the dungeon. (Enter the first room or advance to the next room.)

As long as you've completed a dungeon, Cloister Gargoyle gets +3/+0 and has flying.

Flying

Cloud Elemental can block only creatures with flying.

, Sacrifice Coal Golem: Add .

: Cobalt Golem gains flying until end of turn.

As an additional cost to cast this spell, exile a creature card from your graveyard.

, Exile Cobbled Lancer from your graveyard: Draw a card.

Vigilance

When Codespell Cleric enters, if it was the second spell you cast this turn, put a +1/+1 counter on target creature.

Flash

When Cogwork Wrestler enters, target creature an opponent controls gets -2/-0 until end of turn.

First strike

Look at the top six cards of your library. Put up to two creature cards with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in any order.

Creatures you control get +3/+3.

Escalate (Pay this cost for each mode chosen beyond the first.)

Choose one or more —

• Target player discards all the cards in their hand, then draws that many cards.

• Collective Defiance deals 4 damage to target creature.

• Collective Defiance deals 3 damage to target opponent or planeswalker.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Target creature gets -3/-3 until end of turn.

Domain — Creatures can't attack you unless their controller pays for each creature they control that's attacking you, where X is the number of basic land types among lands you control.

Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles.

, Give an opponent a nonland card you own from outside the game: Prevent the next 1 damage that would be dealt to you or Collector Protector this turn.

, : Draw a card, then discard a card. Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Flying, ward

Channel — , Discard Colossal Skyturtle: Return target card from your graveyard to your hand.

Channel — , Discard Colossal Skyturtle: Return target creature to its owner's hand.

If Combat Celebrant hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase. (An exerted creature won't untap during your next untap step.)

Target creature gets +3/+3 until end of turn and must be blocked this turn if able.

Target creature you control gets +2/+2 until end of turn. If that creature has toxic, draw a card.

, , Sacrifice another creature or artifact: Incubate 3. (Create an Incubator token with three +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

You may cast sorcery spells this turn as though they had flash.

When you next cast an instant or sorcery spell this turn, copy that spell twice. You may choose new targets for the copies.

If it's neither day nor night, it becomes day as Component Collector enters.

Whenever day becomes night or night becomes day, you may tap or untap target nonland permanent.

Concealed Courtyard enters tapped unless you control two or fewer other lands.

: Add or .

Backup 1, backup 1, backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn. Each backup ability triggers separately.)

Trample

Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it.