Darkscreecher Akkarai is one of four descendants of Terokk's ancient enemies who are being held prisoner by the Skettis talonpriests. You learn of their existence from a tome named Adversarial Bloodlines. Originally, you were asked to retrieve Akkarai's Talons if you intended to summon and defeat Terokk. Open a skull pile at one of the red summoning portals in Skettis. If you have 10 Time-Lost Scrolls, you will be presented with a list of names. Select "Darkscreecher Akkarai". The scrolls will be expended and Akkarai will appear in a flash of lightning.