User blog comment:B214/Volume 22 spoilers/@comment-82.50.121.73-20161206231912

I think that Issei could use a sort of sub-species of his DxD G mode if he use dragonification on his whole body and merge it with his DxD armor (so he would be lighter, so faster) and then he could cover his whole body with Ddraig infernal flames which would not create any problem to his body since his scales would be Great Red scales (who is immune to that flames) and then using boost and penetrate to power up and make that flames impossible to stop. ( an attack who would be inspired by Sirzechs "true form") What do you think?