Staircases work just like the game-supplied down-ladders. Each one works only for one use. Leaving the mine or returning to a higher floor will result in the staircase being permanently gone. In addition, once a staircase has been placed, it cannot be picked up again, even if it has not been used. | Staircases work just like the game-supplied down-ladders. Each one works only for one use. Leaving the mine or returning to a higher floor will result in the staircase being permanently gone. In addition, once a staircase has been placed, it cannot be picked up again, even if it has not been used. |