I have come into possession of a certain ancient book, a collection of arcane scrawlings reputed to have been derived from an even earlier transcription, allegedly lost during the great fire of 1666. The Chthonic Chronicles! I cannot disclose here the precise and rather unsavoury means by which I acquired this weather-worn tome, but I immediately recognized the veracity of the fevered inscriptions contained within. Apparently derived from an incomplete Latin translation of the original source material, the text sporadically lapses into an indecipherable tongue which the transcription cryptically notes as being Old High Atlantean. Glyphs, sigils, occult pictograms, six score and ten oblations to some malign entity of colossal evil...some diabolical avatar of the Z'xul