As the Mandalorian Wars raged, Zayne Carrick escaped the Jedi Covenant, falsely accused of murdering his fellow Padawans. While hiding on Taris, Carrick encountered Celeste Morne, one of the Covenant's shadow operatives. Morne was searching for the Muur Talisman, a Sith artifact that could turn humans into monstrous rakghouls. Morne attempted to arrest Carrick but was interrupted by a Mandalorian raid.
Realizing the Mandalorians had found the Muur Talisman, Morne and Carrick stowed away on the Mandalorians' ship to Jebble. The dark talisman possessed Morne, and she began using it to turn the Mandalorians into rakghouls. Horrified, Carrick finally persuaded Morne to see reason. She agreed to be sealed away in an oubliette to protect the galaxy from the talisman's corruptive power. The oubliette was lost when the Mandalorians razed Jebble; however, Carrick spoke of the Muur Talisman‒and rakghouls‒to another Jedi, Alek… later known as Darth Malak.