Fatal Fissure

In Commander, Fatal Fissure sits in awkward territory: instant-speed unconditional removal is exactly what the format wants, but sacrificing a land in a multiplayer game where tempo already lags is a steep tax that most decks can absorb only in the late game. Formats like Standard and Pioneer have fewer alternatives, so Fatal Fissure competes on raw efficiency against the format's removal suite — and the land sacrifice cost is punishing enough that cleaner options tend to edge it out. In Legacy and Vintage, the card pool is deep enough that Fatal Fissure barely registers as a consideration. It's a Commander card first, and even there it's a budget slot-filler rather than a staple.