"Black Luster Soldier", known as "Chaos Soldier" (カオス・ソルジャー Kaosu Sorujā) in the OCG, is an archetype of Warrior monsters with 3000 ATK used by Yugi Muto in the Yu-Gi-Oh! anime and manga, as well as Dimitri in the Yu-Gi-Oh! GX anime, that includes "Black Luster Soldier" and monsters based on it. It is also a sub-archetype of the "Chaos" archetype. Members of this archetype have existed since the Yu-Gi-Oh! Duel Monsters National Tournament, but did not receive support until Dimension of Chaos. This archetype is related to the "Gaia The Fierce Knight" archetype, as cards from both archetypes support each other.