Acolyte of Aclazotz

The 1/4 body is the tell: this is not a creature meant to attack or trade, but to sit back, absorb early aggression, and survive long enough to grind. Attaching the drain to a tap ability means each activation costs a full turn cycle of the outlet itself, a throttle that keeps the engine from becoming an infinite-combo enabler on its own; you get one sacrifice per turn unless something untaps it. The fodder clause reaching both creatures and artifacts is the quietly generous part, since it cashes in Treasure tokens, spent equipment, and expendable bodies with equal ease, widening what counts as ammunition in a sacrifice shell. The drain-and-gain symmetry is old black technology, but the Blood Artist school pays on death, triggering off any creature dying anywhere; this pays on the act of sacrificing, and routing it through an outlet rather than a trigger shifts the strategic axis. Instead of rewarding creatures dying passively, it rewards you controlling the timing and the resource: the fodder has to be something you already hold, so the card is a converter, not a source. It cannot manufacture value from nothing (it needs a permanent to feed it and a turn to spend), but any surplus creature or artifact you were going to lose anyway becomes a two-point life swing, one activation at a time, on a body durable enough to stick around and keep doing it.