Elevator

The Elevator will be an item in the next Bloons Tower Defense game, and will cost $550. It will only be available for purchase during Multi-Level missions or while playing on Multi-Level tracks. It can only be placed off the track, and will allow you to move towers within its range between the underground and land surface levels. You can choose when to move the towers, but it can only be used three times before it gets automatically destroyed by the bloons (at which point, you must purchase another one if you want to continue using it in the same spot).