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.)

Up to one target creature you control gains protection from each of your opponents until end of turn. Draw a card. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.)

Fateful hour — If you have 5 or less life, you can't lose life this turn, you can't lose the game this turn, and your opponents can't win the game this turn.

Flying

When Courier Griffin enters, you gain 2 life.

When Courier's Briefcase enters, create a 1/1 green and white Citizen creature token.

, Sacrifice Courier's Briefcase: Add one mana of any color.

, , Sacrifice Courier's Briefcase: Draw three cards.

Play with the top card of your library revealed.

You may play lands from the top of your library.

Landfall — Whenever a land you control enters, you gain 1 life.

Reach (This creature can block creatures with flying.)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Court Homunculus gets +1/+1 as long as you control another artifact.

When Court of Ambition enters, you become the monarch.

At the beginning of your upkeep, each opponent loses 3 life unless they discard a card. If you're the monarch, instead each opponent loses 6 life unless they discard two cards.

When Court of Bounty enters, you become the monarch.

At the beginning of your upkeep, you may put a land card from your hand onto the battlefield. If you're the monarch, instead you may put a creature or land card from your hand onto the battlefield.

When Court of Embereth enters, you become the monarch.

At the beginning of your upkeep, create a 3/1 red Knight creature token. Then if you're the monarch, Court of Embereth deals X damage to each opponent, where X is the number of creatures you control.

When Court of Grace enters, you become the monarch.

At the beginning of your upkeep, create a 1/1 white Spirit creature token with flying. If you're the monarch, create a 4/4 white Angel creature token with flying instead.

When Court of Locthwain enters, you become the monarch.

At the beginning of your upkeep, exile the top card of target opponent's library. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it. If you're the monarch, until end of turn, you may cast a spell from among cards exiled with Court of Locthwain without paying its mana cost.

Whenever another white creature you control enters, tap target creature an opponent controls.

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.)

Covenant of Blood deals 4 damage to any target and you gain 4 life.

As Cover of Darkness enters, choose a creature type.

Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and/or black creatures.)

Visit — Drop three cards you own from outside the game one at a time onto the playing area from a height of at least one foot (about 0.3 meters). If those cards completely cover Cover the Spot, claim the prize

Prize — You get , then you may put a sticker on a nonland permanent you own. Sacrifice Cover the Spot, then open an Attraction.

Lights — 2, 3, 4, 6

Visit — Drop three cards you own from outside the game one at a time onto the playing area from a height of at least one foot (about 0.3 meters). If those cards completely cover Cover the Spot, claim the prize

Prize — You get , then you may put a sticker on a nonland permanent you own. Sacrifice Cover the Spot, then open an Attraction.

Lights — 2, 4, 5, 6

When Covert Cutpurse enters, destroy target creature you don't control that was dealt damage this turn.

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever Covert Technician deals combat damage to a player, you may put an artifact card with mana value less than or equal to that damage from your hand onto the battlefield.

When Coveted Jewel enters, draw three cards.

: Add three mana of any one color.

Whenever one or more creatures an opponent controls attack you and aren't blocked, that player draws three cards and gains control of Coveted Jewel. Untap it.

This spell costs less to cast for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Search your library for a card, put it into your hand, then shuffle. If you have a full party, you may cast a spell with mana value 4 or less from your hand without paying its mana cost.

Flying

When you control no artifacts, sacrifice Covetous Dragon.

Flying, deathtouch

If Covetous Geist would be put into a graveyard from anywhere, exile it instead.

Target creature can't block this turn and becomes a Coward in addition to its other types until end of turn.

Time travel.

Enchant creature

Enchanted creature can't attack or block unless its controller pays for each card in your hand.

Enchant creature

: Untap enchanted creature.

Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Emerge from artifact (You may cast this spell by sacrificing an artifact and paying the emerge cost reduced by that artifact's mana value.)

When Crabomination enters, target opponent exiles the top card of their library, a card at random from their graveyard, and a card at random from their hand. You may cast a spell from among cards exiled this way without paying its mana cost.

Destroy target artifact or enchantment. Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.

Enchant creature

When Cracked Skull enters, look at target player's hand. You may choose a nonland card from it. That player discards that card.

When enchanted creature is dealt damage, destroy it.

, , Tap two untapped red creatures you control: Crackleburr deals 3 damage to any target.

, , Untap two tapped blue creatures you control: Return target creature to its owner's hand. ( is the untap symbol.)

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.

Trample

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

: Add .

, , Sacrifice Cradle of the Accursed: Create a 2/2 black Zombie creature token. Activate only as a sorcery.

Destroy target nonblack creature that entered this turn.

When this creature enters, this creature assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

: Switch Crag Puca's power and toughness until end of turn.

: Add .

Kicker

This spell can't be countered.

Hexproof, haste

If Cragplate Baloth was kicked, it enters with four +1/+1 counters on it.

Reach, lifelink

One for My Baby — Whenever you attack with two or more creatures, put two quest counters on Craig Boone, Novac Guard. When you do, Craig Boone deals damage equal to the number of quest counters on it to up to one target creature unless that creature's controller has Craig Boone deal that much damage to them.

At the beginning of each opponent's upkeep, that player moves a permanent they control to touch Cramped Bunker and no other permanents. If the player can't, destroy each permanent they control that isn't touching Cramped Bunker, then sacrifice it.

, Exile Cranial Archive: Target player shuffles their graveyard into their library. Draw a card.

Equipped creature gets +1/+0 for each artifact you control.

: Attach Cranial Plating to target creature you control.

Equip

You may sacrifice a Mountain rather than pay this spell's mana cost.

Destroy target artifact.

Trample

Crash of Rhino Beetles gets +10/+10 as long as you control ten or more lands.

Create a tapped 4/4 green Rhino Warrior creature token for each tapped creature you control.

Creatures you control gain trample until end of turn. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

Draw a card.