Telorast and Curdle (or Kerudas Karosias) were ghosts imprisoned in a fragment of Kurald Emurlahn. Talk between the two suggested that they had been sent by Edgewalker but they never elaborated exactly why. The two were always seen together.
Apsalar freed the two ghosts who conversed with her in the language of the Tiste Andii.. Telorast and Curdle went on to accompany Apsalar on her travels. They took the opportunity to gain bodies when Apsalar visited Urko. His fossil collection included the skeletal bones of two small dinosaur-like, bipedal reptiles which the two shades proceeded to possess. As the animation of the skeletons gave Urko new insight into the posture and movement of those reptiles, he agreed that they could keep them as a reward.
As Fiddler conducted a reading of the Deck of Dragons in Letheras, Telorast and Curdle shifted into two Elder Eleint, destroying a tavern in the city. Much later, they encountered Torrent and Olar Ethil, swearing their allegiance to the former after the latter told them she had no need of the two.
Telorast and Curdle followed Torrent and Olar Ethil, rarely making a sound in the presence of the two. During the climax of the novel, as the Otataral Dragon descended to the earth, the two were able to shift into the form of two elder dragons, joining Silchas Ruin in defending the great dragon against the other Eleint. The two were not heard from again in the aftermath of the battle.