Hunter Grimm, Slayer

Whenever this creature mutates, you get an experience counter.

Hunter gets +1/+1 for each experience counter you have.

Whenever Hunter deals combat damage to an opponent, reveal cards from the top of your library until you reveal a nonland card. Put that card into your hand, then put the rest on the bottom of your library in any order. If Hunter is modified, create a treasure token. Otherwise, draw a card.

Flash, mutate {2}{w/b}{u}{u}