Territorial Grizzly

Whenever another creature enters the battlefield,
if that creature's power is greater than Territorial
Grizzly's, put a +1/+1 counter on Territorial
Grizzly.
Whenever another creature enters the battlefield,
if that creature's power is less than or equal to
Territorial Grizzly's, Territorial Grizzly gets
+1/+1 until end of turn.