Koh, the Face Stealer

The design problem here is a graveyard toolbox that never hands you a static permanent to build around: instead of stealing a body, this steals a function. The exile-on-entry sets the first tenant, then every nontoken creature that dies elsewhere becomes an optional filing into a personal library of abilities. What makes the engine tick is the one-life activation that re-chooses which card's abilities Koh currently wears, so the same 6/6 can be a mana engine one turn, a death-trigger payoff the next, and a repeatable removal outlet after that, all keyed to whatever has died into the exile pile. The design lineage runs through cards that impersonate creatures wholesale (Vesuvan Shapeshifter, Volrath's Shapeshifter) and through graveyard-abusing value pieces, but the distinction is precise: Koh does not copy stats or become the creature, it only inherits that card's activated and triggered abilities while keeping its own body. That narrows the ceiling (no evasion, no static keywords, no power-and-toughness theft) and widens the flexibility, because the payoff scales with the diversity of what dies, not the quality of a single copy target. The life payment is the meter that keeps the reconfiguration honest: repeatable, cheap, but a nonzero cost that the card must fund from a finite resource. It is a Shapeshifter built for a graveyard the pilot is actively feeding, rewarding a deck stocked with creatures whose abilities are worth wearing rather than whose stats are worth stealing.