From the Rubble

White pays for its recursion with erasure: most of its reanimation exiles the graveyard, fires once, or comes stapled to a body that dies the moment you look at it. This takes the opposite route. It names a creature type on entry, then quietly resurrects one member of that tribe on each of your end steps, indefinitely, as long as it survives. The finality counter is the tax that keeps a repeating reanimator engine from spinning into an infinite one: each returned creature gets a single second life before it exiles for good, so the enchantment wants a wide graveyard of the chosen type rather than one prize target looped forever. The end-step timing is the other half of the design. Returning at the beginning of your end step means the creature has spent its summoning sickness by your next turn, and it means the trigger sits outside combat, dodging the sorcery-speed window most reanimation lives in while carrying no expectation of a swing this turn. What it really does is turn a tribal graveyard into a slow, grinding attrition resource: one body per turn, until the graveyard empties or the enchantment does. The demand it makes is up-front commitment to a single tribe, and then it makes that commitment relentless.