Will, the Squirrel Master

When Will, the Squirrel Master enters the battlefield, create two 1/1 green Squirrel creature
tokens.
Whenever a Squirrel dies, put a +1/+1 counter on
Will, the Squirrel Master and each Squirrel you
control.
Landfall — Whenever a land enters the battlefield
under your control, each player creates a green 1/1 Squirrel creature token.

"Squirrels."