He shook his head and said "This is the Unwishing stone."
"The what?" I asked, confused.
"It's the counterpart to your stone," he replied "It can undo your wishes. Go on, wish for something."
"Um," I said, gripping my stone "I wish that you had blue skin."
My vision blurred and suddenly Biff had bright blue skin like some giant smurf. He glanced down at his hands and said "I unwish your last wish." Once more my vision blurred and he was back to normal.
I gulped and said "So I guess you want to take my stone from me?"
He shook his head. "I was thinking more about us teaming up with this as my insurance against you."
I sighed and said "I wish...
