Urv, Ursine King

When Urv, Ursine King enters the battlefield, creatures you control gain trample until end of
turn.
Whenever a nontoken bear you control dies,
create a 2/2 green bear creature token.
{1}{g}: Sacrfice a bear. Target creature you control
gets +X/+X until end of turn where X is the sacrificed creature's power.