Vaermina is a daedric prince whose sphere is that of dreams, nightmares, and is associated with torture. He is depicted as a man with a staff and sometimes referred to as female.
He is able to cure vampirism and is solicited by Molag Bal for it who is often turned to by contrite vampires seeking relief from their affliction but the particulars of this transaction are unknown.
His realm is called Quagmire, where evil omens are issued forth and the land is one nightmare. Every few minutes a lightning flash occurs and reality shifts from one horrifying vision to another. Only one artifact is associated with Vaermina:
Skull of Corruption: Deals damage and creates a clone of the target which it will attack.
The daedric prince’s enemies are Ebonarm, Boethiah, Peryite, and Hermaeus Mora but he is allied with Sanguine.
In Daggerfall he rewarded the player for killing an innocent lich.
In Oblivion he had the player retrieve Vaermina's orb after it was stolen by a man who wished to die in his sleep.