making the double stand down and thus rescuing Lois. Later, when realizing Brainiac 13 is vulnerable to Kryptonian technology, Superman completely rebuilds Kelex, using him to coordinate an attack on Brainiac 13 by having Kelex convey instructions to Lex Luthor and later reactivate the Red Tornado. Kelex operates in disguise as the hero 'Steel' for a while. Kelex is featured in an issue of 'Superboy'; he transcribes his impressions of Krypto, who is helping people endangered by an alien invasion. The fortress was later restored within a Tesseract (an infinite space within a finite containment), and Kelex is once again its caretaker. Natasha Irons reprograms Kelex so that he would speak more in slang, such as calling Superman 'Big Blue'. During the "Superman: Godfall" storyline, he even uses 'yo mama!' as a comeback. That incarnation of the Fortress is destroyed during the "For Tomorrow" storyline. Superman relocates his new portable fortress to South America, but Kelex's fate in the storyline was left unknown at the time. The final issue of Justice League of America (vol. 2) briefly relates a story revealing that Kelex returned and attempted to conquer the Earth by taking control of all of the robots on the planet and forcing them to attack the human population. He was destroyed by Supergirl and Jesse Quick, ending the threat. Kelex is seen again in "DC Rebirth", once again a loyal assistant in Superman's Fortress of Solitude. Powers and abilities Kelex has enhanced vision and can fly. Other versions Kelex appears in the limited graphic novel series Superman and Batman versus Aliens and Predator. In other media Television Kelex appears in Supergirl voiced by an uncredited actor in earlier appearances and by Mark Sussman in season six. In season one episode "For the Girl Who Has Everything", when Kara was induced by an alien plant Black Mercy and woke up in apparent revived Krypton, Kelex introduced itself to her as a robotic medical assistant. She explained to confused Kara that she had a fever and her temperature being stabilised. In "Solitude", another version of Kelex, this time with a male voice, serves as a guide to Superman's Fortress of Solitude, to Supergirl and James "Jimmy" Olsen, and to assist them, as the two work to neutralize the threat posed by Indigo AKA Brainiac 8. In "Myriad", within the Fortress, Kelex refused to give Kara information of program Myriad and instead