Ironsoul Enforcer 

Artifact Creature — Human Samurai
Whenever this creature or a commander you control attacks alone, return target artifact card from your graveyard to the battlefield.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL