[@AiyvaGuard] Well all mages use the Fade when they cast magic, the Fade is where all magic comes from in the first place. Spirit Healers are just unique in that they call upon spirits, the beings that live in the Fade, to do there magic. I suppose like all magic if they don't do it right it can result in harming themselves or those around them. I even guess that they could get possessed by a spirit that is helping them, though most spirits aren't too interested in possessing mortals.