User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-39.50.56.168-20180611173847/@comment-2607:FB90:BA42:E202:0:2C:21E1:4C01-20180616125238

Issei has already unlocked all of Ddraig's abilities including his finishing move Scorching Blaze Inferno and has mastered BxB. For CxC he basically mastered that form as well with the only exception is the bishop which is only due to his low demonic power but that can be resolved when he unlocked GR red and the full potential of his 8 pawn pieces. DxD G is still a new form that he's still getting use to.