The Substitution Stone: Plus Karyn, Minus Biff

"I wish *Karyn* was here doing this instead and that you would just *leave*!" Jon shouted at Biff. Suddenly, the stone grew warm in Jon's hand, forcefully reminding him that he was still holding it and his latest wish had just been granted. Except, just like before, his wish wouldn't be granted the way he intended it to. Instead, his wish was changed to ...