A bubbling stream cascades into a hole in the earth, leading to a series of underground watercourses and scintillating grottoes. Adventurers who delve within may discover odd mosses and fungi, a ruined temple complex, and the lair of a crystal-eating dream dragon.

A classic dungeon adventure for characters of 1st to 2nd level.

Requires Old-School Essentials Classic Fantasy or Advanced Fantasy.