OC character name: Nightcore (also know as Death)

In the ancient war between the forces of the darkness and the alicorns, The Dark Lord created 4 powerful demons so they can help him defeat his enemies, one of them is Death. With a silent personality and a great knowledge in deadly spells he is one of the most powerful between the 4 demons. But when he feel in love with an alicorn he started to show weakness and for the Dark Lord that was unforgivable. That's why the Dark Lord murdered his unique love to show him that love is something a demon can't feel .... after that, Death decided to change sides changing his demonic figure into an alicorn ... but using his cursed mark as a reminder of his sins, also changed his name into Nightcore.