I would be amazed if the following excerpt did not serve as an inspiration:
The intruders went forward, feeling that impulse which leads the victors to exult over a vanquished enemy. Malygris sat unbowed and upright, his black and tattered fingers clutching the ivory chair-arms as of yore, and his empty orbits glowering still at the eastern window. His face was little more than a bearded skull; and his blackening brow was like worm-pierced ebony.
"O Malygris, I give thee greeting," said Maranapion in a loud voice of mockery. "Grant, I beseech thee, a sign, if thy wizardry still prevails, and hath not become the appanage of oblivion."
"Greeting, O Maranapion," replied a grave and terrible voice that issued from the maggot-eaten lips. "Indeed, I will grant thee a sign. Even as I, in death, have rotted upon my seat from the foul sorcery which was wrought in the vaults of King Gadeiron, so thou and thy fellows and Gadeiron, living, shall decay and putrefy wholly in an hour, by virtue of the curse that I put upon ye now."
-- Clark Ashton Smith, "The Death of Malygris"