Warstar is a warrior serving in the Royal Elite of the Shi'ar Imperial Guard. The character, created by Chris Claremont and John Byrne, first appeared in X-Men #137.
Warstar is actually two symbiotically linked sentient mechanoids, a small one named B'nee who can generate electricity and a large one named C’cil who is gigantic and immensely strong and durable. B'nee rides on C'cil's back.
Warstar joined in the Imperial Guard's trial by combat with the X-Men to decide the fate of the Phoenix. Warstar was then a traitor who served Lord Samedar, Deathbird, and the Brood in their conspiracy to overthrow Shi'ar Princess-Majestrix Lilandra, and battled the X-Men. After defeating the Brood and the renegades, Lilandra resumed her position as the head of the Shi'ar Empire. Despite most of the Imperial Guard having joined with Deathbird against Lilandra, the team members were pardoned for their actions.
Deathbird later assumed control of the Shi'ar empire, On her behalf, Warstar battled Ch'od of the Starjammers; he was defeated along with the other Imperial Guardsmen by the X-Men and Starjammers.
During Operation Galactic Storm, Warstar fought Captain America in Arizona in an attempt to abduct Rick Jones. Warstar battled Captain America, Iron Man, and Wonder Man during the Kree-Shi'ar War. Warstar was defeated by Gilgamesh and She-Hulk. Incarcerated at Project Pegasus, Warstar comes into contact with fellow Guardsman Hobgoblin. Their teammates Nightside and Scintilla break into Pegasus and free Warstar and Hobogoblin. Hobgoblin impersonates the Kree geneticist Doctor Minerva, and induces the Kree Captain Atlas to accompany him aboard a Shi’ar ship, where the Kree are outnumbered by the Imperial Guard, who then claim Captain Marvel's Nega-Bands for themselves.
Years later, in the Maximum Security crossover, Warstar and fellow Guardsmen Hussar, Neutron, and Webwing were charged for their complicity in Deathbird's coup and sent to Earth, which had been turned into an intergalactic prison planet.The quartet joined with a rogue D'Bari in an attack on several X-Men, but were ultimately defeated. When the Maximum Security storyline resolved, all alien prisoners were removed from Earth, and Warstar, Hussar, and Neutron were later seen among the Imperial Guard again.
Warstar was ripped in half when the Guard fought for their new emperor Vulcan against the X-Men and Starjammers, but Warstar survived and were carried away by their fellow Guardsmen.
During the war between Vulcan's regime and the Inhuman-ruled Kree Empire, Warstar was seen menacing Nova Corps Centurions on the Kree planet Kaiphas, but was stopped by Nova Prime Richard Rider. Both B'nee and C'cil were apparently decapitated by the Nova Prime, with B'nee's head completely missing and C'cil's reduced to a smoking mass.
As a mechanoid symbiote, Warstar is difficult to actually kill, and he appears in a number of later Imperial Guard missions, including "Infinity," the "Trial of Jean Grey," "Time Runs Out," and the return of Thanos.