Metal Eaters are an alien animal species whose main diet consists of metals. They're also capable of eating Kryptonite. Superman had three of the animals in his Fortress of Solitude. ("Supergirl's Greatest Victory!")
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Metal Eaters are an alien animal species whose main diet consists of metals. They're also capable of eating Kryptonite. Superman had three of the animals in his Fortress of Solitude. ("Supergirl's Greatest Victory!")