Medeus (Mediuth in the Japanese version) is an Earth Dragon (and later turned as the Dark Dragon/Shadow Dragon) and the first primary antagonist and the first final boss of the Fire Emblem series. He later returned in Fire Emblem Monshou no Nazo (Mystery of the Emblem) including the remakes Fire Emblem: Shadow Dragon and Shin Monshou no Nazo (New Mystery of the Emblem).