Morganthe is shadow, now you might be thinking that wait in the test realm Morganthe was a bunch of her twins who werent even shadow. Thats because those were the twins that made up Morganthe. The twins were death, balance, ice, and storm. Thats just like saying what makes up the Moon school is Death, Ice, and Myth. During the battle the real Morganthe was the one in the back who fell through glass in the end. That was the shadow morganthe.