A hulking Blue Man (AC 15, MV 120', HD 6, Chaotic) with unusual red hair wields a cursed two handed sword. (This character wields the sword one handed, carrying a shield in the other.) Any character possessing the sword is compelled to eradicate all white men from the world; with each white man they kill their hair turns a darker shade of red. The sword is -1 to hit, but +3 to hit vs. White Men.
Most hex descriptions in Carcosa are kind of crazy.