Abandon Attachments

Abandon Attachments is legal everywhere but earns its slot almost exclusively in Commander, where enchantments and artifacts are ubiquitous and card parity matters over a long game. In 60-card formats like Modern and Pioneer, one-mana enchantment removal exists in more efficient forms — Abrupt Decay, Prismatic Ending, or dedicated hate pieces — and a cantrip that costs two total mana and only hits non-creature permanents doesn't clear the bar. In Pauper, where card advantage is precious and the format is fair, there's more of a case, but the narrow removal type still competes poorly with Gorilla Shaman or Standard Bearer in relevant matchups. Commander is where Abandon Attachments genuinely earns its slot: instant speed, self-replacement, and the ability to answer stax pieces or voltron enchantments on an opponent's turn makes it a clean two-for-one in a format where you need consistent answers across a whole table.