When you cast this spell, you take on an aspect of a wolf, including some of its physical characteristics. You become more rugged, your ears become elongated, and you sprout sharp fangs and fur. You gain a +4 enhancement bonus to Strength and Dexterity, the scent ability, a +2 enhancement bonus on trip attacks, and can make a trip combat maneuver as a swift action. This trip attack does not provoke attacks of opportunity.