A hole in an old oak tree leads characters down to a maze of twisting, root-riddled passageways, the chambers of an ancient wizard-complex, and the banks of an underground river where once a reptile cult built their temples. This adventure is a companion to The Incandescent Grottoes. The two adventures can be played independently of each other or can be connected to form a larger dungeon. Written by Gavin Norman and illustrated by James West.