Acornelia, Fashionable Filcher

Whenever a Squirrel you control enters the battlefield or dies, you get an acorn counter.
{2}{b}, Pay X acorn counters: Target creature gets
-X/-X until end of turn. (To pay an acorn counter,
use one you have or remove one from a permanent you control.)
{g}, Pay X acorn counters: Target creature gets
+X/+X until end of turn.