Eris was the leader of Arcardia and was fighting a war with the dragons in the north. When Derpy befriended Toothless, Arcadia became a land where Unicorns and Dragons could coexist peacefully. However, Eris did not have a dragon like the rest of them. Dissapointed in himself, he used a spell to go to a different place, where he could think about things in a calm place.

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