kryptonide

Kryptonite is a fictional radioactive mineral that first appeared in Superman comics published by DC Comics. It was created by writer Otto Binder and artist Al Plastino, and made its debut in Action Comics #23 (April 1940). Kryptonite is native to the planet Krypton, Superman's home world, and is composed of green crystals. When exposed to kryptonite, Superman experiences various effects, including weakness, fatigue, and eventually, death if exposed to sufficient amounts. The mineral's effects on Superman are due to the fact that he is not immune to the radiation emitted by kryptonite, unlike other Kryptonians. Kryptonite has been a recurring element in Superman's mythology, often serving as a plot device to challenge the character's invulnerability and test his resolve. It has also been used as a weapon against Superman by various villains, including Lex Luthor and General Zod. Despite its harmful effects on Superman, kryptonite has been depicted as a valuable resource in the DC Universe, with some characters mining and trading it for profit.