Sarvien II

King Sarvien II was the last king of Dericost.

AC:DM_CD_Lore/Bestiary/Derethian_Bestiary#Undead

The Steward of Chalicmere presumably lives in the Direlands fortress of that name, but has never been seen by human eyes. She is the current leader of the Latzimestal, as evinced by her title of Steward; she maintains titular control of the Dericost Kingdom in the name of King Sarvien II, the Latzimestal monarch deposed by the victorious armies of Yalain and Haebrous.

Mu-Miyah Note Translation / AC:DM CD Lore/Dericost Texts/Tattered Note:

Not that it mattered on the field that day. While the Kings tenaciously held the gates to Gelid, Alaidain and Jailne, alone, wound their way through the Vasmora, entered the palace, and slew Sarvien the Foolish. For that infamous defeat, the Sand Kings of the high desert were shunned by their own people. Honor demanded atonement for failing to protect their charge.

The History of Auberean/Volume I: Empires Clashing (-30,000 to -9,000):

The situation reaches its climax when the living King Sarvien II is transformed into an undead and proclaims, after his conversion, that he will not step aside to allow a new living ruler to take the throne. Previous challenges to His Eternal Splendor's rule had been swiftly swept aside, but Sarvien II's political maneuvering with other disaffected undead allows him to resist the forces loyal to His Eternal Splendor. Sarvien is also aided by the Winds' unwillingness to expose themselves to the living. Since the Lords have no such compunction, Sarvien II reveals that an undead caste rules Dericost, of which he is the King. All resulting unrest in the Kingdom is put down, and Sarvien sets his sights on expanding the Kingdom. The Kingdom of the Haebrous to the east and the Empire of the Yalaini to the southwest become Sarvien's targets, and his forces invade these lands. This action sparks a period later referred to as the Millennium War.

After nearly 1,000 years of conflict, the Haebrous and Dericost lands are devastated. As the war turns against them, the Lords decide they have lost the blessing of the Old Ones and that the remaining Falatacot are to blame. They set about exterminating the few Falatacot still in the Kingdom. Throughout the war, His Eternal Splendor and the other Winds watch the Lords without interfering, but finally the Winds abandon Vasmora in disgust at the Lords' failures and excesses. The Winds create hidden fortresses in other parts of the world, notably Dereth. This sets the stage for the combined forces of the Haebrous and Yalaini to push their way to the foot of the Plateau of Gelid.

The final battle opens with the Haebrous warrior Leikotha and the combined armies of the Haebrous and Yalaini attacking the living and undead armies of the Dericost. With Dericost attention occupied by the assault, a Falatacot woman who had escaped the Lords' purge leads the Haebrous king, Jailne, and the Yalaini empress, Alaidain, through the trackless tunnels of Vasmora into Sarvien's palace. In a pitched battle, the Haebrous and Yalaini forces destroy Sarvien and his Lich advisors, but the struggle costs Jailne his life. As Sarvien passes into true death, he utters a prophecy from the Book of Eibhil, known as the Fivefold Curse.