Batterskull

In Commander, Batterskull occupies a solid utility role — it's not a build-around, but any deck that wants a self-protecting Equipment or a stabilizing life buffer will run it, especially in Nahiri, Forged in Fury lists where the equip cost vanishes. In Legacy, Batterskull remains a proven finisher in fair blue-white shells, where the bounce clause makes it nearly impossible to answer cleanly with single-target removal. Modern has largely moved past it as threats have become faster and more efficient, but it still sees fringe play in slower midrange and prison strategies that can survive to turn five. Vintage legal but rarely played — the format's pace makes five mana a prohibitive ask even with the upside. Batterskull is out of reach for Pauper, Pioneer, and Standard entirely.