Placed upon one dusty shelf was a controller. It wasn't like any other controller that any store had, let alone this magic shop. This controller was dangerous. Dangerous to the touch. If anyone had control of it, reality would be in the hands of anyone. Every aspect, every strand of DNA, every fiber of being would be theirs to control, and the rest of the universe wouldn't even know if anything changed. A simple ripple in the fabric of reality, then the change would just be "normal" to everyone. Anything could happen. Anything. Species could change, dogs could rule the world, men and women would swap genders, time could go backwards, time could be stuck in the medieval times, body parts could be swapped out with anything, people would be forced to wear clothes that would look odd, anything!
Someone will enter the Magic Shop and find the controller.
All of reality will be in the hands of...