Nightmare

About Nightmare
Nightmare is a Umbrarevian from Planet Umbrakinesis. Ben got this alien when Death Devil (Darkstar) touches the Omnitrix. Nightmare can levitate, teleport, create Darkness surrounding someone, invisibility and manifestation. Nightmare frees himself in Nightmare is the real Nightmare in my dreams. Unusually Ben is able to use it several times, including in Dead's Weapon. Nightmare is not a Ectonourite. Similar to it, he can be effected by the Sun, but he can survive in morning and evening. He can also create Dreams.