Deathless Ancient
The recursion clause is the whole pitch, and it reveals what kind of card this was built to anchor: a Vampire board wide enough that tapping three of them barely registers. The body itself is unremarkable for the cost, a 4/4 flier that lands late and trades evenly with most things in its weight class. What pays for the slot is that it never stays dead. Tap three untapped Vampires and it returns from the graveyard to your hand, ready to be cast again, which means every removal spell aimed at it is a tempo setback rather than an answer. The design discipline is in the activation cost rather than a mana payment: the deck has to already have a critical mass of Vampires for the engine to turn over, so the card reads as inert filler in a list that isn't built around the tribe and as a relentless reanimation loop in one that is. That conditionality is the point. It rewards going wide on a single creature type by converting board presence into resilience, turning the graveyard from a discard pile into a holding pen. The flying is what keeps the recouped body relevant; a returned ground creature stalls behind the same board that killed it, but a 4/4 in the air keeps closing the gap each time it comes back.
