Aughra writes in The World of the Dark Crystal of how TekTih taught her all the movements of the skies and helped her build her observatory and in return she taught him all she knew about rocks and even to the secrets of the metals. He was not reformed at the end due to skekTek 's, and by extension, urTih 's death. The former's laboratory animals rebeled against him and during the struggle, he fell into the center of the planet and burned to death.