A mini chiller is a device built by Caesar. Its cold currents are so strong that they are able to entirely freeze an object in seconds.
When Rex, Noah, Annie, and Claire all went to the Wrightson Hotel to do some ghost hunting, they had found out that Rex used his technopathy in order to fake the haunting. Looking deeper into the trick, the girls found the mini chiller, which was used to completely freeze water from a fountain. Later, it was used by Annie to freeze the black cat before it was cured by Rex.
- 209. "Haunted"
- Claire has read about mini chillers in science journals.