Fenryr, Friend to the Wilds

{1},{t}: Create a 1/1 green squirrel creature
token.
When Fenryr, Friend to the Wilds enters
the battlefield put a +1/+1 counter on all creatures you control.
Whenever a creature enters the battlefield
under your control, put a +1/+1 counter on Fenryr, Friend to the Wilds.