Fumulus, the Infestation

Bring your own sacrifice outlet: the body supplies neither the throat nor the knife, only the reward, and it pays out on both ends of the trade. The middle trigger watches for any nontoken creature going to the graveyard by sacrifice, yours or an opponent's, and answers each one with a flying 1/1 Insect. That Insect serves two masters. It rebuilds the board so the next sacrifice always has fodder waiting, and it stocks the specific creature-type roster the third ability polices. Every Insect, plus any Leech, Slug, or Worm you control, drains a life on attack, so the tokens replacing your losses convert into a slow, mandatory bleed. The nontoken clause is the discipline holding the loop together: the Insects it manufactures can never be re-sacrificed into more Insects, so the machine still hungers for genuine creatures to feed it rather than spinning value out of empty air. The 2/2 flying deathtouch line is almost afterthought, though deathtouch turns it into a fearsome blocker and a chump-trade nobody wants to make while the drain assembles. What matters is the archetype it anchors: black creature-type-matters aristocrats, a corner of tribal sacrifice play that has rarely had a legendary flier of its own to weld the small-creature beatdown to the drain axis. Fumulus is that anchor, though it never spins under its own power and always leans on an outlet planted elsewhere.