Chooksie the squirrel

+1: Put a 1/1 Average squirrel token onto the battlefield.
-3: If you have 3 or more Average squirrel tokens on the battlefield, put a 3/3 Squirrel on steroids token onto the battlefield.
-7: Put 3 0/1 Suicide bomber squirrel tokens with "Tap, destroy everything target opponent controls" onto the battlefield.