When cast an electric blue vapour appears around the casters hand, which seeps in through the skin of the victim. If the victim passes the save vrs death magic they take 4d6 damage from the toxic mist,else every bone in their body begins to break down to dust, 2 bones break every round(double if in combat) until the victim collapses or regeneration is cast upon them ( this only reverses the effect it does not remove the effect of the spell).