Carrion Feeder
No mana cost on the sacrifice ability is the whole engine: every other creature you control is fuel that converts at no additional rate. That free repeatable sacrifice outlet is the structural reason this one-drop has outlived nearly everything else printed alongside it in its set. Where most sacrifice payoffs ask for a tap, a mana, or a once-per-turn clause, this asks for nothing, which makes it the cleanest possible trigger source for death-matters effects: it can empty a board in response to removal, fizzle a targeted spell by eating the target, or stack a dozen aristocrat triggers in a single window before priority passes. The +1/+1 counters it accrues are almost beside the point; the body is a bookkeeping convenience that lets the outlet double as a finisher in a pinch. The "can't block" clause is the cost the design pays for handing you a no-mana outlet on a one-drop: it cannot hold the ground it strip-mines. That tradeoff has aged into near-irrelevance, because the decks that want a free sacrifice engine were never planning to block with it anyway. What it really represents is the moment black got a sacrifice outlet with no friction at all, the version every later aristocrats build measures its outlets against when it wants speed over value.
