Zoraline, Cosmos Caller

The recursion clause carries the whole card, and its restrictions are drawn tighter than the mana cost suggests. It triggers on entry and again on every attack, so this is a reanimation loop attached to a body with vigilance, meaning attacking never turns off the blocker. But the return is gated three ways: you pay a color-committed cost, you pay two life on top, and the target caps at mana value three or less. Those bounds turn a potential broken-object machine into a grindy drip of small permanents: mana dorks, sacrifice fodder, cheap enchantments, other Bats. The finality counter is what keeps the loop from going infinite; each returned permanent gets one, and it exiles the card instead of letting it die for good, so the engine rewards recurring a wide graveyard rather than looping a single piece. Meanwhile the lifegain-on-Bat-attack line points the deck toward a token-swarm identity where the lifegain feeds the same life total the payment is spending. It is a rare case of a value engine printed at a rate that also functions as a fair midrange creature: a 3/3 flier with vigilance stands on its own, and everything else is upside you earn by building a graveyard worth dipping into. The design lives in the gap between "return any permanent" reanimation and the small-ball recursion white and black have always done best.