Willy, Friend of Nature

When Willy, Friend of Nature enters the
battlefield, create a 4/4 legendary bear token
with trample named Broo and a 1/1 bird token
with flying named Strix.
Whenever Willy, Friend of Nature attacks, flip
a coin. If tails, tap Broo and remove it from
combat. Otherwise, put a +2/+2 counter on
token creatures you control.