put this on my first CU(mistake), it is an attack which does energy damage to mob and then gives you a small bit of the damage done back as life to your pet. that said I have not noticed my CU using this, and if so can not tell by damage he does or any life he gets back, so must be very small as far as i can figure. (not sure what the animation looks like though, this would be useful in figuring it out). on a side note my CU that I gave AI, instead of life steal, has a higher DPS as well as heals up faster with just his normal healing than other CU with healing and life steal.