Displacer beast

A displacer beast, also known as a dirlagraun, was a monstrous magical creature.

History
The beast appears to have originated in the Feywild.

Physical description
Displacer beasts were large cat-like creatures 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.

Abilities
Displacer beasts used their innate magic to bend light, making them appear to be a foot or two from their actual positions.

Ecology
These monsters lived in small groups or preferred to be alone. Many humanoids trained them to act as guards or pets, such as evil fey and oni.

Society
Like many big cats, displacer beasts were often pack hunters, although they were sometimes encountered alone.

Discrepancy
On page 66 of Monster Manual 3.5, the alignment of the displacer beast is lawful evil, but in the Monster Manual 4th edition, the creatures' alignment has changed to unaligned. In the Monster Manual 5th edition, it has again become lawful evil.