"I wish Karyn was here," Jon said. He wanted to make sure she was around when he made his wishes, otherwise her memories would change to fit the new reality.
The stone glowed, but something unexpected happened. Just as usual, when the stone glowed, Jon was forced to close his eyes, but when he opened them, he saw that he was somewhere else.
Unknown to him as of yet, however, he wasn't just somewhere else, but someone else as well. In fact, he was inside the body of the person who was closest to him when he made his wish.
Turning to look towards a mirror, a person looked back who was not himself. Instead, it was ...