Cataclysmic monster: Mentor

The primitive era apparition cause was just a lie! Yeah, meteorites appeared because of dinosaurus was just a lie. The reason of their apparation is because of Tyrano alone: He knew the 5 secrets of the universe, which it shouldn't be revealed, and if so, meteorite appeared on the direction of where the person is, causing him death. But who's the responsible of that? Mentor! His role is executing anyone who reveals or knew these secrets. And as Tyrano survived against the meteorite, Mentor will assassinates him with his own hand.