[@Ascendant] Immortality isn't vital to my species, it just seemed logical for beings that are made of pure magic. As for relying heavily on magic, it's fairly minimal at the moment - they're made of it and consume it to continue living. Wielding magic is not something they currently do. 
As for it not magic not being introduced, I think it's safe to assume it exists somehow in the game universe? If it doesn't exist I'll make a new sheet.