User blog comment:Stbk22/Possible Power up's/Techniques for then new group DxD/@comment-1359322-20140108063746/@comment-1359322-20140108131937

Issei and Vali's subspecies could probably be strengthen even more too, Issei using the remaining 4 Evil Pieces, while Vali might create something like the Empirio Juggernaut for his subspecies BB. And eventually, they will manage to combine both the original and subspecies BB for a higher level.