[Baalz]

Nope, just the caster. I'm not entirely sure what the mechanic is, but functionally if you cast it against anything halfway big enough to make it worthwhile the caster will end with 0 fatigue and 200% hitpoints (making it great to finish off a SC buff cycle). Penetration boosters will help a lot on the damage outlay. It's kind of hard to cast too many times in one fight though because you'll hit your own blood slaves.