Wave of Transformation

Exile all creatures. For every creature exiled this
way, if it had power 3 or 4, put a 2/2 wolf token
on the battlefield under the creature's controller,
if it had power 2 or less do the same with a 1/1
wolf pup token, and if it had power 5 or greater
do the same with a 4/4 Direwolf token.