The Thraulgwyn

The pale demons of The Labyrinth: white-haired, painted with lime, mud, and blood; wide pupils like holes, filed teeth, obsidian and bone weapons, human hide worked into leather.

They come up from the deep tunnels to raid, patrol, trade, parley, or drag captives below. They are not a single army — material presents tribal bands, tense parleys, sacred sites, rival groups, and settlements usually ruled by a soithech, a vessel who claims descent from the tribe's founder. Bands may hold artifacts of The Barrow Builders, The Forge Lords, or The Things Below as sacred treasures.

More than anonymous cave raiders. They have taboos, sacred places, grudges, trade goods, forbidden directions, and reasons to negotiate. Their connection to the Things Below can make them corrupted, but their bands still have politics and survival needs.