Darth Scabrous used Dail'Liss to lure Hestizo Trace into the library by mimicking the voice of the Murakami orchid, still alive amidst the Sickness. The plan worked and Hestizo was captured by Scabrous. Meanwhile, Dail'Liss began to succumb to the Sickness, and in his maddened state, he started burning all of the library's scrolls and holobooks. He was found by the Jedi Rojo Trace, Hestizo's brother. After being captured by the Neti and seeing his memories of his discovery of the Sith Temple beneath the library, Trace escaped and went after his sister.
Dail'Liss appeared in the 2011 novel Red Harvest, written by Joe Schreiber. His name translated in the Neti as "lover of knowledge."