March of the World Ooze

March of the World Ooze is legal across every major constructed format except Pauper, but Commander is the format where it actually does something threatening. In 1v1 formats like Modern and Pioneer, a sorcery-speed token spell that demands you discard green cards competes poorly against faster, more resilient threats — the rate just isn't there outside of dedicated Ooze tribal or storm-adjacent shells. In Commander, the multiplayer board state changes the calculus entirely: producing a dozen or more hasty 2/2s in one turn threatens multiple opponents simultaneously, and the discard cost is softened by the larger hand sizes and draw engines the format enables. Oathbreaker can support it in the right signature-spell setup, but March of the World Ooze is at its ceiling in a 100-card singleton environment built around Aeve or token multiplication.