Idea Prompt 66: Four Ring Colors (WIP title)

 The Stumpt four find themselves confronted with Arthur himself. The mage alongside a naga appear with a machine that has a colored wheel attached. 

 Every time the wheel goes around and lands on one of the colors, the person that the color belongs to is shocked. After, the group's minds are swapped with each other and remain there to be studied. One of the four manages to get a message out before they black out.