Superman Comics Debut Kryptonite Claws in 'Kingdom of Zod' Storyline
Originally published as: Superman Officially Introduces The Greatest Kryptonite Weapon Of All Time, Bar None
When it comes to finding new, resourceful, and violent ways to knock Superman down a peg, the common equalizer in most discussions is always going to be Kryptonite, barring magic or other, less memorable alternatives.