Treasure Keeper

A blocker that pays a dividend the moment it stops blocking. The death trigger turns the body into a deferred free cast, but the payoff loads onto a deck's commitment to a low curve: the trigger digs until it finds a cheap enough nonland card (a small creature, a removal spell, a modest artifact, a burn spell), casts it for free, then buries everything above it on the bottom of the library in random order. That ceiling on what qualifies is the balancing act: it keeps the reveal from flipping into the bombs you would actually want to cheat into play, so the swing stays a value bump rather than a haymaker. Because the reveal digs as deep as it needs to, the trigger only whiffs if the library holds no qualifying card at all. That inverts the usual variance: a deck stocked thin with cheap spells turns the dig into something closer to a tutor, surfacing a known target a few cards deeper, while a glut just means it stops at the first hit. The bottom-of-library clause is functionally neutral (relocating unknown cards in an already-randomized deck changes nothing about your next draw), so the only live question is how far down the first hit lives. The result is a creature that wants to die, an artifact that rewards a curve built to feed it, and a sacrifice target in the lineage of dies-triggered value constructs that convert their own removal into fresh board presence.