User blog comment:B214/Question & Answers 5/@comment-82.199.195.143-20151012163215

In Volume 12's Life.0 aka Crimson Promise, when Issei is fighting against the chimera it says that he uses a dragon shot (which is a block of demonic-power) against it when he still hadn't received his evil pieces(it is clearly written that he concentrated his demonic-powers), he also used it to knock out Jeanne again before Rias returned his evil pieces, my question is how did he concentrate his demonic-powers if he had none, and even if it was a translation mistake how did he use dragon-shot-a demonic attack without being a devil, since I don't think dragons have their own type of power like those of devil's demonic-power, because I haven't any dragon use anything but brute strength or fire(examples - Crom Cruach, Grendel, Tannin) except Ophis when she created a powerful attack in the artificial dimension after the promotion test that almost reached the Gremory group(because her powers were unstable), but she is the Infinite Dragon God so I don't think that counts, because Issei couldn't have used her powers. Please answer this question, because it is really bothering me whether it's a plot hole or not.