Sunburst discovers an ancient magic, unlocking the untapped potential within all who live...which is very Chaotic. It is now up to him and a few random misfits to learn all they can about this new power and (in a non-sadistic way) watch as chaos unfolds in this new world of Behemoths, Giants, and Primal beings.

BTW: this story isn't about a form of Equestria's downfall, it's a serious story that sometimes can't take itself seriously.

Tag specifics: "Fetish" is for giant, fat ponies and creatures.
"Sex" is for happy marriage relations.
"Violence" is for fighting mutated ponies and creatures.
"Monster Hunter" is for Dauntless (practically a free-to-play "version" of Monster Hunter)