The name is derived from the message given when you use the portal statue: Based on the information that Tmauruk told you, you figure out how to activate the statue and teleport yourself to the lower catacomb. The Burun Shaman of Kor-Gursha will spawn randomly in the final cell in one of the five prison wings. The door to his cell is difficulty 650 and can either be picked or you can kill one of the Falatacot Prison Warden found midway down all of the wings. There are a number of fixed location Small Skeletal Falatacot Reliquaries throughout the dungeon.