Monomyth GN

What if the secret school of magic you were chosen for...was trying to kill you?
Magic is all but extinct. When the last ailing wizard casts a final desperate spell to summon the descendants of ancient bloodlines to a school for magic now in disrepair...those chosen ones find a horror of the likes they've never experienced. They will have to confront the deepest parts of themselves and defeat each other in order to survive the ordeal.