Old-School Essentials Official Adventure Scenario: The Hole in the OakOld School Essentials Adventure 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. A classic expedition into the Mythic Underworld for characters of 1st to 2nd level. 60 keyed areas, rumour table, loot summary, dungeon background info, suggestions for expanding the dungeon. Keyed