"Okay, how about you will be my test subject?" You asked your girlfriend.
"Okay, sure thing." she quickly answers.
"R... really?" You asked as you confused what she just said
"Of course, I can be your test, plus I always want to be or feel like somebody else, but you better not turn me into something stupid or I will kick your ass" your girlfriend warns.
"Don't worry, I would never do that to my girlfriend. Besides, I'm afraid that I might to lose my girlfriend." you worried.
"Aww, don't be such a baby. I don't want to lose you either. If you're done, you can just turn me back, that's all." your girlfriend finishes as she give a kiss on the lips for calm you down. "Anyway, let us start the transformation, I've been ready for this moments."
After a kiss, she stepped back as you reading the spell book, and then think of a person you want your girlfriend to transforms into. Next you wave your hand and say:"Abracadabra" now you point to your girlfriend with a flashing bright light. You finally realize that your girlfriend was right all along, it really is the spell book. And then, as you step closer to see your girlfriend, you now change her into...