User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-83.30.127.170-20171118101634/@comment-181.115.9.96-20171118174207

At least we know how Vali it's gonna reach the power gap that will exist when Issei unlocks AxA and ExE with the help of Lilith that is,  it's just my guess but if Lilith can create random super devils, mau plus and ultimate class devils then imagine what can she do with her own kin. At the end of the day Issei and Vali will have there fight, so that means they need to be at the same power level so that the readers can simply say "well Issei is gonna god stomp Vali or  vice versa.