Vampyr

Vampyr is one of the Dark Powers and is trapped within the Amber Temple. As he is revered by Count Strahd von Zarovich himself Vampyr must be a patriachal vampire if he is a vampire.

Strahd described to the party of Hallgrimm Mikkenson, Narid Ashplantt, and Eklyre Temere how he is Vampyr's Champion and as a result he is trapped here. However now that he has found Tatyana he wishes to find a successor so that he may leave.

Strahd advised that Vampyr's mind will penetrate through his amber coffin to try and turn the party into vampires.

Dr Rudolph van Richten confirmed he knew of Vampyr and described him as one of the Dark Powers, along with Vecra and Melamut. He attempted to lift Hallgrimm and Narid's polymorph curses but could not, indicating that it felt as though they had perhaps been bestowed on them by a Dark Power.