Inaction Injunction

In Commander, Inaction Injunction is a niche piece: the cantrip makes it nearly free to include, but tapping one creature in a four-player game rarely changes the board state enough to justify the slot unless you're building around the effect. Pauper is where it has the most legitimate standing — the format is slower, a locked attacker matters more per turn, and commons that replace themselves are genuinely scarce. In Legacy, Modern, and Pioneer it sits below the power floor; there are cheaper, permanent answers at every point on the curve. Vintage doesn't want it either — by the time a creature is threatening enough to tap, you want it gone, not temporarily inconvenienced.