We’ve all poked fun at Superman and his Achilles Heel. The last son of Krypton’s weakness is a piece of green rock from his own planet. Granted that is an oversimplification and it’s the radioactive ...

DC presents a unique Kryptonite-like crystal that grants Superman an extremely useful superpower only matched by Lex Luthor and Batman. Green Kryptonite is famously Superman's biggest weakness, but ...