Thunderspire Labyrinth is an adventure module for the core setting of the 4th-edition ruleset of Dungeons & Dragons.
H2 Thunderspire Labyrinth is a D&D adventure designed for heroic-tier characters of levels 4th-6th. It is the second adventure in a three-part series that began with H1 Keep on the Shadowfell and concludes with H3 Pyramid of Shadows. It can also be played as a stand-alone adventure.
This product includes an adventure booklet for the Dungeon Master, a player's booklet containing new character options and campaign information, and a full-color poster map.Behind the scenes[]
While Thunderspire Labyrinth was designed initially for the "points of light" core setting of 4th edition, alterations to the adventure made in an article of Dungeon magazine made it possible to use it as a dungeon for characters in the Forgotten Realms. These changes included changing the focus on Vecna to that of Cyric and relocating Thunderspire Mountain to a geographical location in Faerûn near Cormyr.