Doors are skinnier than walls, and are colored brown. At the beginning of the game they are all locked, and automatically relock themselves when you pass through. You unlock a door by standing in the square on either side of it and playing an appropriate card. The door is now open – it will close when you move away from it. If you end the turn next to the door, you must specify whether you are holding it open! If it is left open, spells and other players may pass through. Sometimes this is a good thing.

Exception: locked doors in the sector with your Lair are yours, and you may pass freely through them. You must still say whether you are holding your own door open for others.

The Remove Lock card can leave a door permanently open. If you destroy a wall containing a door, the door is also gone!