What if reality was just an illusion and any thing were possible? They say that just about everything in science is theorytical and we can conclude that basically everything is an illusion made out by our minds that believe strange things to be impossible.
You've always had the idea that magical things weren't necessarily real when you had one day found a strange item glinting very brightly on the road while driving that would soon change your mind forever. The item was a ring of extraordinary power that could change the user into anything or anyone or anyone else. The ring has picked you to own it since the ring picks whose next. Picking it up you felt a strange presence convincing you to take it. What you hadn't realised is that this ring doesn't let you choose the changes because it's actually cursed(feel free to create an alternate version in which the ring is not cursed). You eye the ring as it shines in your hand and drive home anxiously awaiting to try it on at home.