While the Obsidian Tower is a fun adventure with solid gameplay and equal odds, this Expansion Pack is designed to provide an additional challenge to the overall gaming experience. This Expansion Pack is not intended to be a standalone game and must be added to the original Obsidian Tower game. The Obsidian Tower: Downfall not only introduces 2 new characters but also the Witchlord of Agaroth as well! The expanded gameplay offers new cards, new items, additional plights, and much much more ... —description from the publisher