When you are playing a Construction or a Critter, you may place a Critter from your city beneath this Dungeon to decrease the cost of the played card by 3 of any combination of resources. You do not gain the 3 resources. The Critter in your Dungeon is no longer considered part of your city and is not worth any points. This card cannot be combined with any other card-playing abilities including the Inn, any Forest locations that allow you to play a card, or cards like the Crane or Innkeeper. Dungeon can only have up to 2 prisoners, but the second cell must be unlocked by having a Ranger in your city.