absorbs power from the Omnitrix instead. He uses this to frame Ben for robberies using the alien forms, but the constant changes makes his DNA unstable and he eventually becomes a combination of all ten of the alien forms. Becoming a monster makes him hate Ben more than ever, as he blames him for his new form, and he swears revenge, becoming Ben's secondary archenemy and foil: "Kevin 11". Kevin is a minor antagonist in the first season, the main antagonist of the second season and a minor antagonist in the fourth season. Zs'Skayr – An Ectonurite high king whose rule over the Anur star system saw an opportunity to expand when he learned of the Omnitrix from one of Vilgax's crash-landed data probes. Searching the galaxy, he tried to sample Florana DNA into the Omnitrix but ended up having his own DNA sampled along with it, becoming the genetic donor of Ghostfreak. His powers include invisibility, intangibility, possession, tentacles, energy beam projection, telekinesis and firing energy beams from his hands. He was a minor antagonist in the second season and the main antagonist of the third season. Doctor Viktor - An alien resembling Frankenstein's monster who is Zs'Skayr's second in command and oversees his master's plan during Season 3. While trying to stop Ben from interfering with their plan, Viktor accidentally opens a portal to the Null Void and is sucked in. The Yelnodooshi - A werewolf-like alien who serves Zs'Skayr and gathers satellite equipment for his master's plan. When the Tennyson's interference causes the satellite equipment gather to explode, the Velnodooshi is caught in the blast. The Mummy - A mummy-like alien who serves Zy'Skayr, gathering a dangerous energy crystal with mutagenic properties called Corrodium. When Viktor opens a portal to the Null Void, the Mummy is sucked in along with him. The Forever Knights – A secret British paramilitary organization formed during the Middle Ages and evolved into an international syndicate that first came to the United States in the 1920s. Driscoll / Forever King – A former Plumber kicked out in disgrace after being caught stealing technologies from alien criminals for personal gain, who joined the Forever Knights and eventually became their leader with the goal of achieving world domination. After learning of the Plumbers' secret "sub-energy" weapon the Forever King assembles the Negative 10, a team of the Tennysons' human enemies, to steal it to