Winnny, Squirrel Magnet

Squirrels you control get +1/+1 and have trample
You may cast Squirrel cards from your graveyard.
Whenever one or more Squirrels you control deal combat damage to a player, populate.
Whenever a nontoken Squirrel creatue enters the battlefield under your control, create a 1/1 green Squirrel creature token.