The following description applies to MOD 16 - Undermountain.
Enhancement Power: Chance on hit to increase your power by up to 2,000 and your companion's critical avoidance by up to 4% for 15 seconds when your companion is near. The value of the debuff depends on the quality of your summoned pet.
Player Bonus Power: Increase the power of your At-Will powers by 2%. This effect is doubled while on stronghold map.