Ogthar is the main antagonist of the 2005 animated film Dinotopia: Quest for the Ruby Sunstone. In the beginning of the movie, he is unintentionally released from his stone prison by two bumbling dinosaurs, Rhoga and Thudd whom at the same time, recovers the Dark Ruby Sunstone, which it’s dark powers can endanger all of Dinotopia. He enlists Rhoga and Thudd to help him steal dinosaur eggs needed to create a new invincible army to conquer Dinotopia.

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