 The velya, a relative of the vampire, was introduced in the module "War Rafts of Kron" (1984), and subsequently appeared in the "Creature Catalogue" (1986), and the later "Creature Catalog" (1993).The swamp velya was introduced in the module "Legacy of Blood" (1987).The nosferatu appeared in the gazetteers "The Grand Duchy of Karameikos" (1987) and "The Principalities of Glantri" (1987), and in the "Creature Catalog" (1993).