Luxknight Breacher

In Commander, Luxknight Breacher earns its slot in focused builds that can leverage its on-board effect repeatedly — one-shot value at a four-player table rarely justifies a slot, so you want a commander like Dion, Bahamut's Dominant that magnifies it. In 60-card formats like Modern and Pioneer, the bar is higher: every card competes against a tight curve, and Luxknight Breacher needs a dedicated archetype to justify inclusion over more efficient options. Pauper is where bulk commons sometimes find surprise homes, and if the effect is relevant to an aggressive or evasion-based strategy in that format, it's worth testing. Legacy and Vintage are non-starters for any card that doesn't immediately warp the game state. Standard is the most forgiving proving ground if Luxknight Breacher fits the current environment's tempo.