Displacer Beast

This monstrous predator takes its name from its ability to displace light so that it appears to be several feet away from its actual location. A Displacer Beast resembles a sleek great cat covered in blue-black fur. However, its otherworldly origins are clear in its six legs and the two tentacles sprouting from its shoulders, both ending in pads tipped with spiky protrusions. A Displacer Beast's eyes glow with an awful malevolence that persists even in death.
Displacer Beasts roamed the twilight lands of the Feywild for ages, until they were captured and trained by the Unseelie Court. However, it didn't take long for the Displacer Beasts to use their malevolent intelligence to escape their masters.
Displacer Beasts kill not just for food but also for sport. They target prey even when not hungry, often toying with their victims to entertain themselves until they are ready to eat. After killing its prey using its tentacles, a Displacer Beast drags the corpse to a quiet place where it can feed without distraction.