In the series finale, Ben uses Ascalon and Ultimate Way Big to fight the powered-up Vilgax. After defeating him, Azmuth destroys the Ultimatrix and rewards Ben with the official, finalized Omnitrix.
– An ancient, extra-dimensional monster accidentally breaks free from a Forever Knight vault. ben 10: ultimate alien all episodes
The conclusion of Ultimate Alien marked the end of the darker "UAF" (Alien Force/Ultimate Alien) era. The story directly picked up in Ben 10: Omniverse , featuring a younger art style, the return of classic aliens, and Ben partnering up with a new Plumber named Rook Blonko. In the series finale, Ben uses Ascalon and