Dungeons and Dragons Lore: Yugoloths

Spawned by Night Hags and Baernaloths eons ago in the Gray Waste of Hades, the Yugoloth invaded and ever since claimed Gehenna as their home, they are the Neutral Evil Mercenary of the Lower Planes, for the right price, they will bring all manor of suffering to other beings, but, beware, they may very well double cross you if a better offer comes their way.