Squirrel Tea Party

Squirrel Tea Party enters the battlefield with
four Acorn counters on it.
Whenever a nontoken creature enters the battlefield, you may move an Acorn counter
from Squirrel Tea Party onto it. It becomes a Squirrel in addition to its other types.
As long as Squirrel Tea Party has no Acorn counters on it, Squirrel creatures get +1/+1.