Not that I can make one or anything, but for those of you who've watched Highschool DxD, don't you think it would be a cool idea to make a modded character based off of either Issei or Vali? Something along the lines of their main aspect would be to double in power every turn or two, or to halve the enemies power every turn or two. The other character could show up as an elite battle, or a boss for a spire floor.

Personally I think it'd be pretty cool, but I can't make it happen.