Tornado Elemental

Commander is where Tornado Elemental actually sees play — the format's slower clock means six mana is reachable, and a fresh table of three opponents often has at least one oppressive flying threat worth nuking on entry. In Legacy and Vintage, it's unplayable; those formats punish six-mana do-nothings in the late game and have zero interest in a creature that dies to Swords to Plowshares before the triggered ability resolves. Modern is technically legal but the card never shows up, and for the same reason — the format has moved far past the power level where a 6/6 with a conditional board wipe competes. In Commander specifically, the value floor is high in creature-heavy metas that rely on Avacyn, Angel of Hope or Atraxa, Praetors' Voice to close games, though Tornado Elemental earns its slot only when your meta is meaningfully flying-heavy.