User blog comment:B214/Volume 21 info & spoilers/@comment-28087053-20160424011718

OK!! I have a question. Vali used Ophis powers to use DD, but I'm wondering if the power he used from ophis was awakened like issei or given like when she gave it to Shalba and Diodora. Because if Vali did awakened that power, then isn't the author contradicting himself when he said that any devil or dragon that used that power would die seconds after, so the only reason Issei could withstand that power was thanks to great reds flesh. Hope someone can clear up my doubts.