Mana Seism

Commander is the only format where Mana Seism reaches its ceiling — with four players all developing land bases, the board routinely holds 20–40 lands, turning this into a ritual that dwarfs anything else at its mana cost. In Legacy and Vintage it's legal but essentially unplayable; those formats have actual fast mana, and sacrificing lands for situational burst is far too slow and resource-negative against decks running Force of Will and zero-mana acceleration. Modern is the same story — the format's land counts are too low and the turn clock too tight for Mana Seism to generate meaningful value. Oathbreaker is legal and can occasionally exploit it in big-mana red builds, though the smaller starting life totals and faster games shrink the window considerably.