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Nidotrum was once the apex predator of the ancient world, devouring anything smaller than it. Only after the species went extinct due to natural disasters could any other lifeforms begin to thrive again.

Thanks to its gargantuan jaws, which could shred thick metal plates as if they were paper, it was invincible in the ancient world it once inhabited. A Nidotrum's thick tail packs enormously destructive power capable of toppling a metal transmission tower.