Lathean is a promoter in Might and Magic VIII: Day of the Destroyer. He gives the party the Find the Sarcophagus of Korbu and Korbu's Remains quest, and promotes Vampires in the party to Nosferatu once it is completed.
Korbu was considered by many to be the greatest and most powerful vampire of all time. One hundred years before the Night of the Crystal, Korbu felt guilty about the vampiric need to feed on others, and began to seek forgiveness. He quarreled with the other vampire elders, and decided to construct a crypt where he could ponder his existence.
Lathean wished to seek the great vampire's counsel, so he asked the Hero of Jadame to find Korbu - or his remains, if he had perished.
Lathean can be found in his home in Twilight and gives the party the Find the Sarcophagus of Korbu and Korbu's Remains quest, which requires them to retrieve the Remains of Korbu from the Cyclops Larder and the Sarcophagus of Korbu from the Crypt of Korbu.
Once the quest is completed, he can promote Vampires to Nosferatu. He is also responsible for promoting Necromancers to Liches once the Find the Lost Book of Khel quest has been completed for Vetrinus Taleshire.