User blog comment:B214/Question and Answers 2/@comment-99.227.35.241-20140123192432/@comment-1359322-20140203135117

Well right now we can only wait till Volume 17 to see how Issei develops the ability he obtain in Volume 16.

Though since Issei took in Albion's power into his BG, it makes me wonder if he could do the same for other Dragons. If he can, damn Issei would sure be OPed.