Publisher's blurb: Delve into dungeons deep and old with this adventure for a group of four to five 4th-5th level characters! In eons past, civilisations long lost to the sands of time worshipped the infernal gods of the Underdark. Amongst these places of worship is Xibalba, or the “Place of Fear”, a subterranean temple built into a cave system deep beneath the earth. Here in the underground temple, the would-be champions of the ancients brave the trials of Xibalba in order to gain the favor of their infernal deities. Now thousands of years later, the rediscovery of these lost proving grounds, awakens a slumbering darkness within Xibalba, beckoning anyone worthy or foolish enough to brave the depths of darkness...