First Dex study- Keep cool

Dex wants to control everything, so he is very rational, and he needs to keep cool in every moment.
He uses that little iron ball, which you can see on the top of the page.
Closing the left hand, this little ball causes a small bleeding from the hand, and a medium pain.
As a pinch can wake from a dream, in the same way, closing the hand, the pain that this iron ball causes wakes up Dex from a state of irrationality, which is for example caused by the fear of something.