Terror Demon (lore)
ADVERTISEMENT
From Diablo Wiki
The ancient texts describe the terror demons as unconquerable foes, the dreams of Diablo made flesh. They appear in shadow to torment their victims, and then...in shadow they vanish. The mere sight of one drove a Horadrim to madness, leaving h im screaming and clawing at his eyes until the end of his days. -- Deckard Cain