An exploration adventure for experienced adventurers set underground. The lost tower of titans and its surroundings: 2 boss encounters, a unique magic system, rare and valuable reagents and two secret passages to be discovered. This adventure was created with a high-level party in mind, but playtesting showed that even a random bunch of adventurers could sneak in and plunder the Tower's riches. It would be a good fit for groups that like to venture deep underground, want a challenging boss fights, or just want a good old scary and dangerous dungeon delve. It also has pathways to locations that are still in development (and are to be published as a separate adventures later), but any DM could easily use them to link the Tower back with their world.