The following description applies to MOD 16 - Undermountain.
Enhancement Power: Chance on hit heal your and your companion for 4% maximum health over 15 seconds when your companion is near. The value of the debuff depends on the quality of your summoned pet.
Player Bonus Power: 10% chance to do 30% damage and root the source of the damage for 6 seconds (3 seconds if target is a player).