Emekan, Angel of Longevity

Muskateer (You may have three
commanders if they all have Muskateer)
Flying, Indestructible
As Emekan, Angel of Longevity enters the battlefield
choose a creature type.
Creatures you control of the chosen type have
base power equal to twice their original power.
Creatures you control of the chosen type have toughness equal to twice their original toughness.