Balhannoth

Balhannoth
There are no virtues in the Shadowfell. Thanks to the balhannoth, even hope is punished with death.
Balhannoth
Native to the Shadowfell, the vicious, predatory balhannoth alters reality in its lair to make the place appear inviting to travelers. Once they step inside, the balhannoth springs its trap.
False Hope
Thanks to a limited form of telepathy, a balhannoth can sense the desires of other creatures and identify images of places where they expect those desires to be met. The balhannoth then warps reality around it, remaking its environment so that it matches the appearance of the place the creature seeks.
The balhannoth never quite gets all the details right, and plenty of incongruities might give away the deception, but the imitation is good enough to fool desperate creatures into stumbling into the monster's clutches.
Malevolent Entities
A balhannoth thrives on fear and despair, taking pleasure in the horror its victims experience. It terrorizes its prey by using its reality—warping powers to mask its presence until it can snatch the target. Then it teleports away to feed on its victims.
Useful Slaves
Drow hunting parties and other denizens of the Underdark sometimes venture into the Shadowfell to capture balhannoths. They install the creatures as guardians, protecting passages from enemy intruders and cutting off avenues of retreat or watching over slaves.
A Balhannoth's Lair
In the Shadowfell, balhannoths make their lairs near places inhabited by creatures they hunt. They typically haunt well-traveled roads and paths, snatching people who come along. A balhannoth that has been captured and exploited by drow might lair in caves near Underdark passages and guard the ways in and out of a drow enclave.