| anime = [[Yu-Gi-Oh! (second series anime)|Yu-Gi-Oh! (Duel Monsters)]]

'''"Orichalcos"''', spelled "'''Oreichalcos"''' (オレイカルコス ''Oreikarukosu'') in the Japanese version, is a [[series]] of cards that revolves around "[[The Seal of Orichalcos]]" and are used by [[Dartz]]. It is currently an anime-only series, except for "[[Orichalcos Shunoros]]" (which had its effect changed to support [[Normal Monster]]s when it was released), and "[[The Seal of Orichalcos]]", which will be released in ''[[Legendary Collection 3: Yugi's World]]''. It was very likely inspired by the fabled Atlantean metal [[wikipedia:Orichalcum|Orichalcum]]. It is one of main Antagonist Forces in the Waking the Dragon as led by the god of the Orichalocs [[The Great Leviathan|Leviathan]] after brainwashed the last of the Atlantic King, they was defeated by the Legendary Dragons in ten thousands years ago. But was only weakened as they have to start the entire to repeat the same fate as the Atlantic destroyed for the Leviathan to being revived once again to destroying the Humanity.