With a groan the ground crumbles under your feet, the entire section of the tunnel giving way to a deep darkness and the rush of water. There is a feeling of weightlessness, followed by the icy wet clutches of an underground river.

When Revealed: Discard all Item, Armor, Weapon and Light cards and all encounter deck cards from play, Shuffle all enemy and treachery cards in the encounter discard pile together with the Foundations of Stone encounter set. This deck becomes the new encounter deck. Remove all other encounter deck cards from the game. Then, starting with the first player, each player draws a random stage 4 quest card. Remove all other stage 4 quest cards from the game.