AStoryForOne
I like that you actually treat Chaldea as an magical UN organisation and not just a starting point of plot.
I think from what I got in the latest FGO spoiler, Goetia is supposedly an eternal guardian for humanity by Solomon. The destruction Solomon see in fact is a lostbelt, not by Goetia. Human incineration is the only way they know to avoid the lostbelt. So, if Wil know how to prevent lostbelt, I think he can make Goetia as his ally
EXTREME SPOILERS, DIRECTED ONLY TO THE AUTHOR, READ AT YOUR OWN RISK Oh boy the Ordeal Call hit, and it hit HARD. So, Chaldea was evil all along, Marisbury was trying to eradicate humanity, by substituting the model (The Alien God/World is presumably CHALDEAS itself) and real history. The bleached world was his plan all this time, plan that was foiled by Goetia, who makes a comback in Romani's body. I'm literally shaking in my seat, eager to see how the author can wrangle this mess of a plot.[img=update][img=recommend]