Blood Aspirant

Commander is where Blood Aspirant earns its slot — sacrifice synergies run deep in the format, and any deck built around Aristocrats, token generation, or modular counters will find it pulling double duty as a win condition and a removal-on-a-stick. In Pauper it's a legitimate threat; the format's common-legal sacrifice engines are plentiful enough to keep it busy, and the 1-damage ping is meaningful when the whole format plays small. Modern and Pioneer have the card pool to support it but also have far more efficient payoffs, so it sits at the fringe of those formats rather than the center. Legacy and Vintage won't touch it — the power floor is just too high.