Your body contorts as you transform into the creature lurking inside you.

Daily   ✦     Polymorph
Minor Action      Personal

Effect: You assume the form of a gray wolf or a tiger of your size until the end of the encounter, until you fall unconscious, or until you drop to 0 hit points or fewer. In this form, you add your Wisdom modifier to your speed. In addition, whenever you walk as a move action, you can shift 1 square as a free action before doing so.

Published in Player's Handbook 2, page(s) 24.