That's one way to beat Goetia. Why go through all that trouble to defeat Goetia yourself, when you could call your lover (Meridia) to beat up your bully (Goetia)? Haha. I wanna see this in the main story.
i just thought of it, he plans to get a grail from nasuverse but what if he gets the grail of dxd? will he able to revive the servants? hahaha his mom too