Human: Produce a detailed written description of a chilling scene inside of a medieval tower with a device at the top of the stairs. Assistant: 
The top floor of the tower is colder than the rest, and a large device at the top of the stairs blocks off access to the top of the former clock tower. Freezing cold air drifts downward from the device in even waves, spilling frost onto the carpeted stairs and down the hallway. The area is very quiet, the only noise coming from the soft whirring of the strange magical device that seems to be generating the cold.