Old-School Essentials Adventure
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 expedition into the Mythic Underworld for characters of 1st to 2nd level.

TheIncandescent Grottoescan be linked with The Hole in the Oakto form a large, 3 level dungeon with over 115 keyed encounter areas!