M'Baku, Jabari Chieftain (Extended Art) (MSC-382) - Commander: Marvel Super Heroes Foil
At the beginning of your end step, if there is no monarch, target opponent becomes the monarch.
Whenever a creature attacks one of your opponents, if that player is the monarch, that creature gets +1/+1 and gains trample until end of turn.
Whenever a creature attacks one of your opponents, if that player is the monarch, that creature gets +1/+1 and gains trample until end of turn.
