Squirrel Girl

When Squirrel Girl enters the battlefield or
attacks create two 1/1 green squirrel tokens.
If one or more tokens would be created
under your control, those tokens plus that
many 1/1 green Squirrel tokens
are created as well.
{g}{g}, Sacrifice two Squirrel tokens: Put a
+1/+1 counter on each token you control.