Talk to the evil wizard
From Create Your Own Story
"How could you do this?" you ask. "Joojoo never did anything to you!"
"Ah, child, did my tiger tell you?" the wizard asks. "I'm doing this for a reason. Your cat is the host of tiny parasites filled with power. When I kill her, those parasites will migrate to me, making me the mightiest wizard who's ever lived. I am not evil. If I do nothing, the cat will likely die in some fool accident... Getting run over by a truck or falling out of a tree. Then the power will be wasted! Wasted!"
His words make sense. Joojoo isn't a very careful cat. She probably would die in an accident.
"So say goodbye to your kitty," the wizard says.
Do you: