Tibeem was a member of the chromatic schism of the Cult of the Dragon.

He was sent to Phlan, along with two co-conspirators (Ellison and Spernik), to infiltrate Mantor's Library and learn the location of the Temple of the Scale. He was successful in this task, but was detected and apprehended by the Black Fist. He killed a member of the Black Fist during his arrest, and was subsequently interrogated (to little effect) and executed by being hanged from the Stojanow Gate.