Fealty to the Realm 
Enchantment — Aura
Enchant creature When this Aura enters, you become the monarch. The monarch controls enchanted creature. Enchanted creature attacks each combat if able and can't attack you.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL