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{{About|the character|the cards|"[[Legendary Dragon]]"|"[[The Fang of Critias]]""|the and|"[[Legendary Knight]]"|"[[Legendary Knight Critias]]""}}

{{Infobox/Yu-Gi-Oh!/Charactercharacter | image name = Knight Critias.jpg | card = * [[The Fang of Critias]]* [[Legendary Knight Critias (anime)|Legendary Knight Critias]] | english name en_name = Critias | japanese name ja_name = クリティウス | romaji name romaji_name = Kuritiusu| el_name = KuritiusuΚριτίας | greek name gender = ΚριτίαςMale| organization = [[Legendary Knight]]s | anime debut anime_debut = {{episode|Yu-Gi-Oh!|150|ref}} | appears anime appears_in_anime = ''[[Yu-Gi-Oh! (second series anime)|Yu-Gi-Oh! (second series)]]'' | gender = male | japanese voice ja_voice = {{voice actors|ja|Kenjiro Tsuda}} | english voice en_voice = {{voice actors|en|Eric Stuart}}

'''Critias''' was is a character in the ''[[Yu-Gi-Oh! (anime)|Yu-Gi-Oh!]]'' anime. He is a legendary knight from the [[Atlantis]], who aided [[Ironheart]] in the Battle of Atlantis.

Critias has a ''[[Duel Monsters]] '' card form. The card, "[[The Fang of Critias]]", along with its counterparts "[[The Eye of Timaeus|Eye of Timaeus]]" and "[[The Claw of Hermos]]" are unlike other cards. They have their own set of rules and are color coded blue. They are [[Spell CardsCard]] s that can combine with other cards. Critias can combine with [[Trap CardsCard]] s to form [[Monster CardsCard]]s. It has been shown to combine with three such cards, "[[Crush Card Virus (later DM anime)|Crush Card Virus]]", "[[Tyrant Wing (anime)|Tyrant Wing]]" and "[[Mirror Force (anime)|Mirror Force]]", forming "[[Doom Virus Dragon (anime)|Doom Virus Dragon]]", "[[Tyrant Burst Dragon (anime)|Tyrant Burst Dragon]]" and "[[Mirror Force Dragon (anime)|Mirror Force Dragon]]" respectively. "Tyrant Burst Dragon" further combined with "[[Blue-Eyes White Dragon (anime)|Blue-Eyes White Dragon]]" to form into "[[Blue-Eyes Tyrant Dragon (anime)|Blue-Eyes Tyrant Dragon]]".

The battle ended with neither side victorious and Atlantis sunk to the bottom of the sea. The Dragons were sealed in crystal prisons, until they would be needed again.

[[Seto Kaiba]] was chosen as a Legendary Duelist to wield Critias. During his Duel with [[Alister]], he was subconsciously taken to the Duel Monsters Spirit World, where he saw Critias trapped in his prison. By removing a sword he set Critias free and got the card "[[The Fang of Critias]]", so that he may Summon "Critias" while playing ''[[Duel Monsters]]''.

As a card, Critias had the ability to combine itself with [[Trap CardsCard]]s. Kaiba used it to make use of his "[[Crush Card Virus (later DM anime)|Crush Card Virus]]", which Alister had prevented him from using with "[[Royal Decree (anime)|Royal Decree]]". He used it in his second Duel against Alister to Summon "[[Tyrant Burst Dragon (anime)|Tyrant Burst Dragon]]" then "[[Blue-Eyes Tyrant Dragon (anime)|Blue-Eyes Tyrant Dragon]]".

When Yugi and Kaiba faces Dartz, Kaiba combined "The Fang of Critias" with Yugi's "[[Mirror Force (anime)|Mirror Force]]" to Summon "[[Mirror Force Dragon (anime)|Mirror Force Dragon]]". Yugi later used "[[Legend of Heart (anime)|Legend of Heart]]" to change the dragons back to their true forms. Together with [[Timaeus]] and [[Hermos]], Yugi was able to defeat Dartz's "[[Divine SerpentGeh]]" and win the Duel.

DoomVirusDragon-JP-Anime-DM-NC.png | [[Doom Virus Dragon (anime)|Doom Virus Dragon]]<br />''("[[The Fang of Critias]]" + "[[Crush Card Virus (later DM anime)|Crush Card Virus]]")''TyrantBurstDragon-JP-Anime-DM-NC.png | [[Tyrant Burst Dragon (anime)|Tyrant Burst Dragon]]<br />''("[[The Fang of Critias]]" + "[[Tyrant Wing (anime)|Tyrant Wing]]")''MirrorForceDragon-JP-Anime-DM-NC.png | [[Mirror Force Dragon (anime)|Mirror Force Dragon]]"<br /> ''("[[The Fang of Critias]]" + "[[Mirror Force (anime)|Mirror Force]]")''KnightofDestinyTimaeustheKnightofDestiny-JP-Anime-DM-NC.png | [[Timaeus the Knight of Destiny (anime)|Timaeus the Knight of Destiny]]<br />''("[[Legendary Knight Critias (anime)|Legendary Knight Critias]]" + "[[Legendary Knight Hermos (anime)|Legendary Knight Hermos]]" + "[[Legendary Knight Timaeus (anime)|Legendary Knight Timaeus]]")''