This series consists of stories that split from canon continuity at some point.
They use Discord's backstory from The Last Draconequus.
Elements of Opposition (series): Discord travels to an alternate timeline so he can have fun without angering his new friends, and ends up in a horrible situation.
Not The Hero: Discord's the only creature in Equestria who can recognize the human for what he is -- not the long-lost Seventh Element that never actually existed and couldn't have existed before the human arrived, but a meta-reality warper, an entity far more powerful than Discord with the power to warp the minds of all around him and the very rules of magic to make sure that he's always the Big Hero. And the role the human's assigned to Discord is the Villain to beat down or kill.