User blog comment:B214/Question and Answers 4/@comment-24098614-20150319012538/@comment-25032153-20150319085535

they also get the coma like illness which Rias cousin's mother had which was said to cuase death this was said just before the fight between Rias and her cousin which was using the lion king armour so their is many things. they have also said that light poisoning which was also death becasue of light is already poison. the curse blood of dragon killer.