Gibberling
From Ardrana
They come screaming, jabbering, and howling out of the night. Dozens, maybe hundreds, of hunchbacked, naked humanoids swarm unceasingly forward, brandishing short swords. They have no thought of safety, subtlety, or strategy, leaving others with no hope of stopping their mass assault. And then, having come and killed, the gibberlings move on randomly back into the night.
The first impression of gibberlings is of a writhing mass of fur and flesh in the distant moonlit darkness. The pandemonium is actually a mass of pale, hunchbacked humanoids, with pointed canine ears, black manes surrounding their hideous, grinning faces. Their eyes are black, and shine with a maniacal gleam. They carry short swords in their overly long arms as they lope ever faster forward.
Note: Gibberlings originally appeared in this form in the 2nd Edition Monstrous Manual for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.