Komand'r later betrayed her home world with detailed information about Tamaran's planetary defenses to the Citadel. They conquered Tamaran with ease, and the surrender conditions included the enslavement of Koriand'r. Koriand'r was never permitted to return, since that would mean the Citadel would devastate the planet for abrogating the treaty. Komand'r was her sister's master and made the most of her younger sister's bondage with years of horrific servitude and torture. When Kori killed one of her rapists, Komand'r decided to execute her as punishment, but not before the sisters were attacked and captured by the Psions. Psions, largely a species of sadistic scientists, performed a deadly experiment on both of the sisters to see just how much ultraviolet energy their Tamaranian bodies could absorb before exploding from the overload. During the procedure, Komand'r's forces attacked the Psion ship to rescue her and while the Psions were distracted, Kori broke free with her newly developed starbolts, highly destructive blasts of bright pink-colored ultraviolet energy, which were a result of the experimentation. Against her better judgment she decided to free Komand'r, who was still absorbing more and more ultraviolet energy. However, far from grateful, Komand'r had struck her younger sister down with the same (but much stronger) lilac-colored ultraviolet energy and had her restrained for later execution. Kori escaped and stole a spaceship to planet Earth, where she met a young group of heroes-Robin, Beast Boy, Bumblebee, Speedy and Kid Flash- and helped form the new Teen Titans.