Wights are undead monsters animated through the force of hatred and violence, creatures whose fury is now directed against all living beings. They are infamous for their ability to devour life essence, resulting in level drain. Those slain by wights rise as the very creature that slayed them, since wights can create spawn.
Wights appear as they were in life, but wild and pale, with claw-like hands, fang-filled mouths, and faces twisted into expressions of revulsion and hatred.
Wights first appeared in the OD&D White Box set, where they were further described as being immune to normal missiles (arrows and sling-stones and the like), but not silver-tipped missiles, or magical missiles.