Another one for the evil world lore

Nathan was cursed by the beast and Michael (The main character) saved him

how that happened?

Each year his corruption increased untill he had the personality of a jerk bully, then of a villain who built a tower by a strange power in the triforce, the corruption was defeated by Michael by making the same as Link in the end of ocarina of time, now after 20 days sealed into the chamber of the 7 sages, Nathan was back and purified, using the corruption and triforce of power to melt the monsters