Look I'm sorry, and I doubt he will do anything this powerfull ever or at least any time soon... If he does he might die. After he fell, any one of you can easly kill him now, and he was posesed by one of the graitest fighters of all time with one of the most powerfull magic swords and his only point was to stop the fight long enough to not fracking die... He also needs freinds, now that he has used up his notebook he cant do shit without takeing a long time to draw it or drawing another notebook. the hole thing was that he had an entire notebook of his glyphs done at the start and he used up all his energy. If you make it so that I must ret-con it I will acsept that, but if you are mearly warning me I doubt a case like this will come up again... ever. I doubt that after he has the demoness on his side he will have to stop her to many times from killing things, she will have plenty to fight with the humans and all... but whatever, your choice ^-^