Dark Matter Vampires

Dark Matter Vampires are strange humanoid beings formed by Nox that come from the reaches beyond the universe, made out of pure dark matter. They're vaguely bipedal in shape and constantly flowing. A single touch can dissolve most matter. They don't seem to follow any standard laws of matter and are extremely dangerous.
The one thing stopping them from destroying the universe is their vulnerability to high amounts of pressure or UV rays and the low numbers of them. The few that have been seen were all followers of The Black Heart. Two have been named: Raphael and Paradise. Raphael was defeated long ago by the Aasimar and Paradise has not been seen in decades.