Traitor's Clutch

In Commander, Traitor's Clutch occupies a narrow lane: sacrifice-outlet decks that want a one-time theft to feed an Altar or trigger an etb, usually in black shells running Grixis or mono-black. Pauper is where it sees the most competitive consideration, since the card pool is shallow enough that sorcery-speed theft with built-in evasion can close games. In Legacy and Vintage the effect is simply too slow and too conditional — those formats have better ways to steal or kill permanents at instant speed for less mana. Oathbreaker mirrors Commander in that the right planeswalker-plus-signature-spell pairing can abuse it, but the same deckbuilding constraints apply.