Flawless Maneuver 
Instant
If you control a commander, you may cast this spell without paying its mana cost. Creatures you control gain indestructible until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL