Last night I was reading the Glossography for the Guide to the World of Greyhawk when I ran across a villain that actually made me catch my breath.
". . . Fifteen years ago, the city of Greyhawk . . . was plagued by a series of strange disappearances among the youth of the noble families. The children simply disappeared at night, never to be seen again, though sometimes they were replaced by simulacrums that committed vile blasphemies and had to be destroyed. After investigation both magical and mundane, the city magistrate determined that the wizard Murq was behind these awful outrages. (His exact purpose was never ascertained.) When a grim and determined group of high level guardsmen was sent to apprehend Murq, he had already fled, leaving behind only another simulacrum that was killed vowing vengeance upon the magistrate and the city.
The magician Murq and his outrages have almost been forgotten. Recently, however, the respected magistrate’s sleep has been invaded by evil dreams. In these nightmares, mad Murq appears surrounded by a cold fen, threatening the magistrate and the city with doom. He boasts of having found an ancient volume of great power, whose secrets are enabling the magic-user to create a mist golem. This creature, Murq claims, can slay others, but cannot itself be slain. When the stars are right, the golem shall be finished. Then it shall be sent to kill; first the magistrate, then anyone it can find, until everyone is slain or driven out of the city . . ." (Gygax, pg 26)
". . . Hardly less notorious was the rogue wizard known as Murq, who, in 561 CY, kidnapped two-score children of Greyhawk’s noble families and fled the city. The fate of the children was never determined, though a group of adventurers (subtly guided by the Circle of Eight) tracked down Murq in the far north and, through a magical construct, prevented him from attacking the city again. The fate of Murq and the children was never revealed to the public . . ." (Moore, 61)
". . . A search of Murq’s abode offered no insight into his motives for the kidnappings, nor what became of the children (though it was frequently postulated that they had been sacrificed to some nefarious deity), Furthermore, investigators found nothing that could be used to track down the wizard. Indeed, Murq had disappeared without a trace, just as his victims had done . . ." (Mullin, pg 64)
My money's on Franz-Urb'luu.