User blog comment:Stbk22/Possible Power up's/Techniques for then new group DxD/@comment-1359322-20140119035953

Just a random idea, what if Ddraig and Albion each fought against some legendary beasts in the past and sealed them. Then due to Rizevim and the Khaos Brigade's recent actions, they get released and tries to seek for Issei and Vali for revenge but Issei and Vali ends up taking the legendary beasts' powers and power-up instead.