Quest module: In addition to activating gems, players now need to complete special quests before they can leave the temple. At set-up the quest tiles are shuffled separately, and 1-3 of them are then shuffled (unseen) into the deck. This means you never know what challenges you will face.
Character module: Each player plays one of six different characters: Doc, Mechanic, Discoverer, Dark Priest, Muscleman, Mentalist. Each character comes with two unique abilities, and at the start of the game you pick one.