This handy little Restoration perk has been the source of massive headaches for me lately. Don't know why, but I keep getting "Requiem" from it, which would be nice if I wasn't traveling with Serana. Every time she raises a minion, this burns her to critical state, and at least as often as not leaves her mad at me when she recovers, necessitating console commands or loading a previous save to fix. I don't -use- undead minions for the most part, but having them burn away instantly when I DO bother trying to use them is also a bit annoying.