Kozilek, Butcher of Truth

The cast trigger is the design decision that separates this Eldrazi from its siblings. Where others in the original colorless cycle reward you for resolving them or punish the opponent on entry, this one pays its ten mana back the instant it goes on the stack: four cards drawn on cast, before the creature is a permanent, and even a counterspell that removes the body cannot stop those draws. That timing matters. The card advantage is locked in even if the body never sticks, which makes the 12/12 far harder to answer than its size suggests. Annihilator 4 handles the part that wins games, stripping four permanents on every attack so a single connection unwinds a defense. The death clause works backwards from how players assume a recursive threat behaves: rather than sitting in the bin waiting to be reanimated, it shuffles itself back into the library the moment it dies. That is an anti-graveyard mechanic, not a reanimation reward. It dodges exile-light removal and refuses to be milled out, but it also denies the sorcery-speed reanimator a target, so the only way to recur it is to draw it again. The whole package reframes what a finisher's mana cost buys. Ten is steep, but you are not paying for a body that demands a turn to matter; you are paying for immediate draws, an attack that ends the game, and a threat that resists ordinary graveyard hate by burying itself.