While tracking goblin leaders, the party found one of the old entrances to The Dwarven Holds. This cave contained a wide tunnel leading to a sealed stone door covered in intricate runes. Touching the door caused a cloud of acid to come into being filling most of the tunnel. The group tried several attempts to open the door, but the cloud appeared every time.
The mercenary hobgoblin cleric of the Keeper was found in this cave, studying runes in one of the side chambers.