Aerie Ouphes

Persist turns a one-shot anti-flyer cannon into a two-shot one, then hits a hard ceiling. The sacrifice ability throws the body's power as damage at a creature with flying, so the first shot lands for three; when the 3/3 dies, persist returns it once at 2/2, ready to fire again for two. Sacrifice it that second time and it stays dead, because persist checks for a -1/-1 counter before it triggers and the returned copy is already wearing one. That ceiling is the design, not an accident: two guaranteed shots, three then two, with no further loop unless something strips the counter or recurs the creature outright. The problem it answers is old and specifically green's, the flyer that ground-based creatures cannot otherwise touch, and it answers from the battlefield rather than off the top of the deck at instant speed. The threat sits in play as a visible deterrent before it ever needs to fire, which quietly taxes how an opponent commits to the air. It also reads as a natural partner for counter-manipulation and sacrifice-for-value: erase the negative counter and persist arms a fresh trigger, while a sacrifice outlet banks two death triggers off a single creature. Left alone it is a fair-rate green body with a reach answer stapled on. Given support that clears the counter, those same three lines become repeatable removal that also happens to block on the ground.