Nighthaunt

A nighthaunt was a the weakest type of nightshade; a sentient undead monster from the Plane of Shadow. They were thoroughly unnatural to Toril and malicious in being, taking delight in the corruption and suffering of others. As creatures of both death and shadow, they had tremendous powers over darkness.

Description
Nighthaunts somewhat resembled gargoyle, with a body that appeared to be made of shadow itself. They had no true face, rather a flat triangular space inset with empty, lifeless eyes.

Abilities
Nighthaunts were surrounded by aura of desecration, that drained the life force of those they touched. They were powerful spellcasters, capable of summoning legions of lesser undead, who used tactics of condusion to divide and conquer their foes.

Perhaps the nighthaunt's only weakness was the fact they were weakened by both natural and magical daylight.

History
Nighthaunts were more common in the ancient days of Imaskar, but were virtually unknown in Faerûn as of the 14 century DR. However, in 1375 DR, a nighthaunt named Ysval led an army of undead with the goal of conquering Thay.