Orichalcos

"Orichalcos", spelled "Oreichalcos" (オレイカルコス Oreikarukosu) in the Japanese version, is a archetype of cards that revolves around "The Seal of Orichalcos" and are used by Dartz. This is the archetype in opposition with the "Legendary Knight" archetype. "They are currently an anime-only archetype, except for "Orichalcos Shunoros", which had its effect changed to support Normal Monsters when it was released. It was very likely inspired by the fabled Atlantean metal Orichalcum.

"Orichalcos" cards are focused on half-stall, half-Beatdown tactics by limiting the opponent's offensive tactics while building Life Points and an army of monsters.

Strategy
"Kyutora" is Summoned in the Spell & Trap Card Zone to protect it from attacks while it negates Battle Damage that weaker monsters, like "Gigas" would take by constantly ramming.

The related "Divine Serpent" has infinite original ATK, but one that has a huge cost in attacking and a winner-take-all style condition: Once it's Summoned, the controller loses their hand and Life Points, but doesn't lose until it is removed from the field.

So far, only "Orichalcos Shunoros" has a OCG/TCG equivalent released in Limited Edition Pack 15; since "The Seal of Orichalcos" was not originally a legal and available card, "Orichalcos Shunoros" was retooled as a Normal Monster support card. However, "The Seal of Orichalcos" is slated for release with Legendary Collection 3: Yugi's World in the TCG.

Literally translated, "Orichalcos" (Ορείχαλκος) means "brass". "Η Σφραγίδα του Ορείχαλκου" being Greek for "The Seal of Orichalcos" literally translates into The Seal of Brass. "Ορείχαλκος Δεύτερος" in English being "Orichalcos Deuteros" literally translates into Second Brass and "Ορείχαλκος Τρίτος", "Orichalcos Tritos", translating to Third Brass.