"I wish Karyn was here." Jon didn't want to make any wishes without her, since she wouldn't notice what was different.
The stone glowed, but Karyn wasn't the one who appeared. Instead, the person standing in his room was a middle-aged woman named Karen Philips, one of his neighbors. Unknown to Jon, the stone he used was actually the Spelling Stone, which changed his wish to: "I wish Karen was here."