Breach

In Commander, Breach is a fringe inclusion at best — one-shot combat tricks rarely earn a slot when 99-card decks demand permanents or spells that generate lasting advantage. Pauper is where Breach has the most realistic home, slotting into aggressive commons-legal decks that need cheap evasion to close games quickly. Legacy and Vintage both allow it, but neither format wants this effect at any price. The most compelling Commander use case is a voltron or combat-damage build where menace on the right attacker on the right turn is a repeatable pattern — but even then, an enchantment or equipment that grants menace permanently is almost always the correct choice over Breach.