User blog comment:B214/Volume 22 spoilers/@comment-180.254.53.9-20160719190550/@comment-95.90.227.243-20160720133734

Impossible ? Are we both reading the same Novel ? Because i think not :D It is not Impossible if he can become one! No one Knows if Issei has also Powers of Great Red. Or what will come if Issei master the Infinti Power of Ophis. Ophis nerfed it the Way that DxD becomes with Issei Stronger, so it is Possible. Should read again the last Vols ;)