Eternium was said to be the strongest metal known to Eternia. It was mined by the Kulataks in the Ice Mountains. Trapjaw attempted to bite into some, but it proved to be to hard for even his steel teeth. Man-At-Arms fashioned a prison trong enough to hold the Evil Warriors out of Eternium. It should not be confused with the rust-colored substance named Deterium, which has unknown properties, but sickened Trapjaw when he consumed it.
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