"Straw Hat" Luffy

When Luffy enters the battlefield, if there are 4
or more creature types among creatures you
control, you become the monarch.
As long as you are the monarch Luffy has
trample and reach.
Whenever you cast a creature spell, if it doesn't
share a creature type with Luffy, put a +1/+1
counter on Luffy.
"I'm gonna become the king of the pirates!"