Geraldimo, the Mastermind

Whenever Geraldimo the Mastermind enters the battlefield, you may create a Legendary Artifact
named Forever Rock with "{t}: Target Otter
creature you control gains +2/+2 and
vigilence until the end of the turn."
{b/g}{b/g}, {t}: Mill 2 cards, then create X tapped
treasure tokens equal to the amount of nontoken
Otter creatures you control.
Friends Forever