These mad creatures, the inhuman shock troops of the Blackmoorish despot known as the Egg of Coot, rival some of the baser sorts of demon with their rage and aggressiveness. All attempts by other warlords to control them and exploit their blade-sharpening abilities have met with failure, and a majority of the information on them was acquired by spying on lairs of those wild specimens who have escaped the Egg's control. A possibility worth invest' gating is creating an isolated and escape-proof refuge, transporting a tribe there, and regularly swapping their modified weapons for normal ones.

- The Fiend-Sage of Rel Astra, from Enchiridion of the Fiend-Sage, Fourth Report

Qullans

Qullans are seemingly insane humanoids adorned with tattoos, warpaint, and ritual scarring. All members of the qullan race wield longswords sharpened to an incredible edge, and continually radiate an aura of confusion. 

Never wearing armor and either travelling naked or clad in animal skins, qullans are primitive beings that glorify destruction and chaos. Eight or more feet tall, they ritually scar themselves and adorn their battle scars with tattoos and warpaint. Filled with hate for other intelligent creatures, qullans never cooperate with other creatures and attack beings of all alignments. Despite their limited skills in metalworking, they have an innate talent for sharpening swords until they strike more accurately than any masterwork blade.

Qullans are so totally chaotic that any attempt to force one to do anything it would not normally do causes its inherent powers of confusion to 'feed back', resulting in the instant death of the creature. Thus, no-one has ever been able to learn the methods they use to forge the sharp edges on their swords, nor has anyone been able to induce a qullan to restore the edge to one of their fine broadswords for a non-qullan.