Card Appearances:Legendary Knight Critias
- In episode 181, Yami Yugi uses this card during his Duel against Dartz. He Special Summons this card via "Legend of Heart" along with "Legendary Knight Hermos" and "Legendary Knight Timaeus". Yami Yugi then used all three knights to attack "Orichalcos Aristeros". The latter's ATK then became equal the ATK of the knights plus 300. All three attacks failed, but "Orichalcos Shunoros" lost 3100 ATK with each attack, eventually making the ATK of "Shunoros" 5900. "Shunoros" then attacks this card, but Yami Yugi uses this card's effect to activate the effect of the "Mirror Force" in his Graveyard, destroying all of Dartz's monsters and inflicting the ATK difference between this card and the destroyed monsters as damage to Dartz. "Mirror Force" is banished afterwards. Dartz then activates the last effect of "Orichalcos Shunoros" to summon "Divine Serpent Geh". In the next episode, this card and "Hermos" attack "Divine Serpent Geh". Yami then uses this card's effect to activate the effect of the "Attack Guidance Barrier" in his hand, redirecting the attack to "Hermos". Yami then uses the effect of "Hermos" effect to banish his three Magnet Warriors, so that "Hermos" can redirect the attack back at "Critias" as well as multiply its ATK value by the number of monsters banished. Yami then uses this card's effect to redirect the redirected attack back to "Hermos". This creates an infinite loop and allows Yami Yugi to activate the second effect of "Timaeus", which allows Yami Yugi to have "Timaeus" absorb "Critias" and "Hermos" and Special Summon "Timaeus the Knight of Destiny". Later, Kaiba uses this card in the battle against The Great Leviathan. It was brought out via "Legend of Heart" along with the other two knights. All the monsters that the three chosen Duelists summoned and brought out then attacked the Great Leviathan, but the attacks did not destroy it. When the Great Leviathan attacked, Yami Yugi had "Legendary Knight Timaeus" absorb the power of "Big Shield Gardna" in order to protect everyone. This saves the chosen Duelists and the three Knights, but every other monster that was summoned was destroyed. In the next episode, the chosen Duelists each summon out three new monsters. All the monsters that the chosen Duelists have then attack the Great Leviathan, along with the Duel Spirits that have come to aid in the fight, but the Great Leviathan still did not suffer any visible damage. The Great Leviathan than attacks, destroying all of the chosen Duelists' monsters, including the three Legendary Knights.
