User blog comment:Stbk22/Possible Power up's/Techniques for then new group DxD/@comment-1359322-20140108063746/@comment-82.40.154.8-20140204205740

i believe that Juggernaut Drive andf Break down the beast are meant to be the next level for certain sacred gears. Also For Issei, i think he makes a subspecies around the Dragons he produces but with more abilites.