I know, unoriginal thread is unoriginal but I'm bored so I'm posting it anyway.
Here's mine: A bald guy who's head is so shiny he can intensify and reflect sunlight off it to create pwerful beams of heat & light.
Disadvantages: Only works in sunlight.
Post yours!
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The ability to change the color of any light source made by man, But only you can see it.