User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-24053170-20180716184925

If Issei could handle the full power of Diabolos Dragon's Infinity and had use of a King Piece, would he be powerful enough to beat Trihexa on his own?

Yes I know that the King Piece shouldn't work on him because of the Pawn Pieces he already has, but hypothetically speaking do you think it would be possible otherwise?

Since Issei keeps getting more powerful with each new threat he is forced to face, that I am beginning to wonder if he would eventually be able to master diabolos dragon to the point that he could potentially handle the full power of Ophis's infinity and be able to challenge trihexa directly and defeat him....