Elric the Sorcerer was bored, and as most know, when a man who wields powerful magic is bored, not much good tends to happen. He had amused himself before by giving out cursed trinkets, the little band had been particularly successful, but right now he wanted to amuse himself more...upfront...with some mortals.
His magic was mostly of a Mystical sort, rather than fire or ice or some such. He specialized in warping the bodies of humans. He found a special enjoyment in making people much older or much younger.
He was divided between whether making them aware or unaware was more fun. Likewise, he was divided on the subject of changing their mind, a decision he usually made after their body was done changing.
As he walked down the street, seeming like nothing but a normal American teenager, he saw someone who piqued his attention...how to change them...?