Marvel Universe

Nearly 100 years in the future, the mutant known as Emplate had created a plague of vampire-like creatures using his marrow-draining abilities. By leaving victims alive, Emplate could turn them into marrow vampires like himself, and by Bishop's time period packs of Emplates hunted in the old cities. They were responsible for killing or turning two of the original members of the XSE, and Bishop's sister Shard as well.