Stygian, also known as the Pony of Shadows, is a male unicorn and the antagonist of the season seven finale Shadow Play. He is a battle strategist and friend of the Pillars of Old Equestria who turned into an evil pony of darkness. His alter ego is first
but it depends on the intent of their users. As for the Elements being sacrificed, I would presume that Star Swirl's spell would require something/somepony being sent to limbo with the Pony of Shadows. However, the darkness wasn't forced into limbo by the Elements, but drawn in after be...