Gnoll Vampire

Gnoll Vampire
When a gnoll's ravenous hunger is so great that it craves flesh and blood even after death, it can rise as a vampire to continue its feeding frenzy.
A gnoll vampire is a savage predator that feeds on the blood of the living. It cackles maniacally when it catches the scent of its prey and quickly moves in for the kill, tearing away flesh with its claws, gorging on meat and blood, and leaving nothing behind but bones, gristle, and the victim's blood-spattered belongings.
Gnoll vampires are indiscriminate feeders that prefer the flesh and blood of humanoids, including other gnolls. Their noses can't stand the scent of perfumes, and their ears can't abide words spoken aloud in Celestial. They don't cast reflections in mirrors unless they want to.
Unlike normal vampires, gnoll vampires don't have coffins where they rest, and they have no such places to return to when their corporeal bodies are destroyed. They are undeterred by running water, and they can enter residences without invitation. When a gnoll vampire needs to travel quickly, it adopts the form of a giant, emaciated hyena. When it wants to catch its prey by surprise, it takes the form of a cloud of mist. After it feeds on a victim's blood, its mist form takes on a crimson hue for an hour or so before its colorlessness returns.
Tekeli-Li and the Caves of Hunger
Tekeli-li was a Gnoll Fang of Yeenoghu||fang of Yeenoghu, a powerful gnoll whose pack invaded Icewind Dale more than a century ago. When the gnolls' wanton slaughter of reindeer herds threatened the survival of the Reghed tribes, the tribes banded together against the gnolls and routed them in the autumn of 1333 DR. Tekeli-li and his surviving kin fled across the tundra with the Reghed tribes in pursuit.
The wounded gnolls found an icy cleft on the edge of the Reghed Glacier and hid there for the winter. To keep their leader alive, the other gnolls allowed Tekeli-li to eat them one by one, yet his hunger would not abate. Auril came upon the starving, half-frozen creature and flung Tekeli-li into an icy tomb deep within the glacier. In doing so, the Frostmaiden sought to preserve what the gnoll had become—the embodiment of winter's remorseless consumption.
Tekeli-li exists today as a gnoll vampire that hasn't fed in decades. Adventurers who use the 'Rime of the Frostmaiden|IDRotF|23' to create a passage through the glacier unknowingly release the starving gnoll vampire from its icy sepulcher. For more information about Tekeli-li's lair, the Caves of Hunger, see chapter 6|IDRotF|16.