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Green Kryptonite

Kryptonite is a radioactive crystalline substance forged deep inside the planet Krypton. Krypton's explosion ejected millions of tons of the material into space. Variations in its composition create a range of different colors and properties.

Although Kryptonians are most susceptible to it's effects, it's radiation is dangerous to life from other planets as well.

Green Kryptonite causes immediate sickness to Kryptonian life. Prolonged exposure can be fatal.