Yharaskrik

Yharaskrik is an illithid who came to Calimport to study the artifact Charon's claw. The creature lived in the deep tunnels below Kohrin Soulez's throne room in Dallabad Oasis after pretending to be defeated by Kohrin Soulez, who was armed with the powers of Charon's Claw.

Appearance
Yharaskrik appears as a humanoid creature with a truly horrible appearance. The creature has a bulbous head that resembles a huge brain, with several tentacles protruding from the part of his face where a nose, mouth, and chin should have been. Like other illithids, the creature is a powerful psionic energy user easily defeating any enemy with stunning blasts of mental energies. The illithid has a bubbling, watery voice that is described by Artemis Entreri as a sound made by a very old man with too much phlegm in his throat.

Yharaskrik and Bregan D'aerthe
After Jarlaxle and Bregan D'aerthe successfully attack Dallabad Oasis, Yharaskrik allies himself with Kimmuriel. The creature teaches Kimmuriel how to prevent Crenshinibon from controlling him, thereby making Kimmuriel an ally of necessity.

Yharaskrik provides Kimmuriel with a small square lantern which has one open side and the other three sides shielded. When candle of the lantern is lit, the glow of the lantern (a Tower of Iron Will's sphere of influence ) over Crenshinibon will temporarily diminish the shard's power. The lantern is used in the Bregan D'aerthe coup by its lieutenants (Rai-guy, Kimmuriel and Berg'inyon Baenre) against their leader, Jarlaxle.

Death
Yharaskrik uses Rai-guy, then current leader of Bregan D'aerthe to locate Crenshinibon after Artemis Entreri escapes the Bregan D'aerthe coup by it's Lieutenants with Crenshinibon and Jarlaxle. Later, in the tunnels close to Hephaestus's chamber, Yharaskrik attacks Rai-guy so that Crenshinibon can be destroyed by bringing it before Hephaestus. But the illithid is defeated by Rai-guy. Yharaskrik then surrenders to Rai-guy, but is supposedly killed (when the creature tries to escape by melting into the stone) along with Rai-guy (and destruction of Crenshinibon) by the fiery breath of Hephaestus.

Rebirth
Yharaskrik, as well as Hephaestus and the Crystal Shard, are morphed into the Ghost King during the beginning events of the Spellplague. As a dracolich endowed with tremendous magical and physical power, the Ghost King acts a triumvirate with each component contributing either arguments or agreements toward their common goal:revenge.