Flying

When Cold Case Cracker dies, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Vanishing 3 (This enchantment enters the battlefield 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 the battlefield and at the beginning of your precombat main phase, exile target creature an opponent controls until Crack in Time leaves the battlefield.

Each player sacrifices a permanent.

Whenever you activate an ability of an artifact or creature that isn't a mana ability, Crackdown Construct gets +1/+1 until end of turn.

, , 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.

Flash

When Crackling Spellslinger enters the battlefield, if you cast it, the next instant or sorcery spell you cast this turn has storm. (When you cast that spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Whenever an opponent casts a Spirit or Arcane spell, Ishi-Ishi, Akki Crackshot deals 2 damage to that player.

Players can't gain life this turn. Damage can't be prevented this turn. Skullcrack deals 3 damage to target player or planeswalker.