WizKids Dungeons & Dragons: NMU: Displacer Beast W1

Displacer beasts were large cat-like creatures, sometimes described as panther or puma-like with six legs and a pair of long tentacles sprouting from their shoulders. They were covered in a pelt of blue-black fur. They were usually about 9 feet long and weighed as much as 500 pounds, but the occasional mutant could be twice this size. In some versions, they were considered to be emaciated. Displacer beasts used their innate magic to bend light, making them appear to be a foot or two from their actual positions. Displacer beasts were not very intelligent, but they were more so than animals and could even speak some Common.

Many humanoids trained them to act as guards or pets, such as members of the Unseelie Court and onis. Like nearly all big cats, displacer beasts were loners.