Karthus is a harbinger of oblivion, zealously devoted to the beauty and clarity of death. Even in his youth, he was utterly obsessed with mortality, growing ever more relentless in the pursuit of his dark desires. Yearning to be one with death itself, Karthus journeyed to the Shadow Isles and willingly offered himself to undeath. Karthus transformed into the Deathsinger, a dread lich existing solely to deliver the blessed gift of annihilation.