being that it's a random story pulled from someone's ass, i'd say there's an infinite number of possibilities. it's not like the game would really be all that much different, but at least you're not being forced into some linear story, doing something that's clearly wrong from the start, only to get preached at.
here's one:
realizing you were being played as a pawn, you jump on the first train out of no-man's land, end up at Hogwarts, and begin hunting down a giant f'n snake that's turning people to stone, and then you kill it, save the cheerleader, and in the process save multiple worlds from destruction and evil.
or if you want to restrict it to that imaginary world:
you can either surrender yourself to the priest and such, be put in prison, have a sequence showing you after you're released as you sit on a the beach eating watermelon, and then suddenly see yourself surrounded by the demon things which then take your life or transform you into a boy with horns or something.
could also find yourself leading the men on horses to one of the colossi, and then sacrificing yourself, and having them killed in the process, and never completing the spell.
hey, it's just a random story with no real meaning, feel free to make your own!