Keeper of Keys 
Creature — Human Rogue Mutant
When this creature enters, you become the monarch. At the beginning of your upkeep, if you're the monarch, creatures you control can't be blocked this turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL