Kryptonite


 * "It was Kryptonite, my son. A substance from your birth planet, Krypton. It will have negative side effects upon your physiology."
 * ― Jor-El informing Kal-El

Kryptonite is a radioactive mineral from the planet Krypton. Following its destruction, some Kryptonite found its way to the planet Earth.

Green Kryptonite

 * "There are multiple types of Kryptonite. The one you were exposed to must have been Green Kryptonite. It will remove your powers as long as you are exposed to its radiation, even killing you if it’s prolonged exposure."
 * ― Jor-El informing Kal-El

Kryptonite is normally green, and Kryptonians exposed to the element will become weak within close proximity or pierced by weapons laced or made from the substance, and prolonged exposure is fatal. Kryptonite's effects are radioactive in nature and therefore cannot penetrate the element lead. The radiation of the mineral can be harnessed and used independently of the mineral itself to harm a Kryptonian, usually appearing in the form of artificial light emitted from certain machinery.

Physical signs of being affected by Kryptonite are somewhat fever-like, including nausea, weakness, dizziness, vertigo, fatigue, pain, and loss (or near loss) of consciousness. Physical contact with Kryptonite of higher intensity is enough to cause burning pain.

It has even been used as anesthesia or a sedative against Kryptonians due to its effects. Kryptonite inside the body causes green glowing veins to protrude from the skin of the Kryptonian and the physical pain it causes becomes unbearable at that point.

Red Kryptonite
Rather than weaken Kryptonians physically, Red Kryptonite alters their minds by weakening and gradually destroying their inhibitions, as well as bringing out every negative thought to the surface. They can even feel its effects long after they have left their presence.

As this happens, red, glowing veins momentarily protrude from the skin when they first come near it and in times when the victim's actions and thoughts are most affected by the Red Kryptonite.

Symptoms of Red Kryptonite infection first start as the Kryptonian becoming more abrasive and immature in personality and actions as their mental and emotional restraint is lessened. Eventually, the Kryptonian will be left without morality, patience, rationality or any cares, whatsoever. They can even develop narcissistic tendencies and arrogance that results in an inferiority complex. After having expressed their negative personality traits fully, the Kryptonian will become malevolent and prone to hostility and aggression, leaving them a danger to everyone around them.

Silver Kryptonite
A silver-colored form of Kryptonite. This kryptonite will cause a Kryptonian to fall in a deep and frightful hallucination where nothing from the outside world will stir them out of it until it leaves their system. Unlike green kryptonite, silver kryptonite will not weaken or dampen a Kryptonian's powers at all. When in vast quantities, it will reveal itself as glowing silver veins on the Kryptonian's skin.

Known users

 * Clark Kent: Clark houses multiple forms of Kryptonite in his Fortress of Solitude. Native to his homeland, he keeps it as a precaution.
 * Lex Luthor: LexCorp had somehow found Kryptonite and used it to power Project Metallo.
 * John Corben: Metallo was a direct result of LexCorp's research.