The superpower I pick would be Synchronicity Wave Travelling
This is one of the powers that John Constantine has and its a more formal way of saying super lucky. I picked this because it always seemed that all superheroes that have superpowers come with inherent downsides. It seems to me that, by definition, this negates all downsides because if it didn't then I'm not lucky. I look forward to seeing what side effect I could get that would make this a bad thing.
