The top five or six “steps” of a great pyramid rise out of the jungle here; most of the structure remains buried beneath the forest floor. The pyramid is usually sealed tight, but persistent explorers occasionally bypass its magic wards and gain entry. Invariably, they report a maze of stone tunnels that seems to go on forever, opening onto empty chamber after empty chamber. But when the two moons of Athas align in a certain way above the pyramid's apex, the sealed entrances gape wide, issuing forth green light and hypnotic music. At such times, yuan-ti priests emerge from the Temple of the Sky Serpent to practice abominable rites atop their shrine, and yuan-ti war parties range far into the surrounding jungle.