You can find it in this Yu-Gi-Oh! card set Invasion of Chaos
A deck-archetype that reigned over all tournaments prior to the creation of the Forbidden List, it is these monsters and "Yata-Garasu" that were blamed for the creation of the Forbidden List in the first place. The trademark Chaos cards are Chaos Emperor Dragon - Envoy of the End (commonly abbreviated to CED), Black Luster Soldier - Envoy of the Beginning, and Chaos Sorcerer. When they were first released, Chaos Emperor Dragon and Black Luster Soldier were the two that were used, because Chaos Sorcerer's effect didn't seem to make it worth playing at the time. The original Chaos Deck relied on discarding Light and Dark Attribute monsters and removing them from play to meet the popular Special Summoning conditions of the Chaos monsters. With their powerful effects, ability to be easily summoned, and high attack power, the Chaos monsters could easily dominate an opponent. It is of popular opinion among the best players in the game that Black Luster Soldier is the better card, for its ability to remove from play helpful monsters used by many during this time such as, Sangan, Witch of The Black Forest, Sinister Serpent, and others that had to be sent to the graveyard to get their effects.
With Chaos Emperor Dragon in particular, players would use its effect while Sangan or Witch of the Black Forest was on their field by paying 1000 Life Points to destroying all cards on the field and in both players hands, allowing the player to search their deck for Yata-Garasu with either Sangan or Witch's effect once they went to the graveyard with CED's effect. With Yata, this could stop the opponent from drawing cards if it inflicted Life Pointdamage to them. The end result is a situation in which the opponent has no cards in their hand or on the field, and cannot draw, making it impossible for them to win, barring effect cards in their graveyard activating. This dangerous strategy has become known as a Yata-Lock, and both Yata-Garasu and Chaos Emperor Dragon were two of the cards on the first Forbidden List for this reason. After Chaos Emperor Dragon and Black Luster Soldier were banned, the Chaos theme didn't see much play until the release of the popular card, Cyber Dragon in the Cybernetic Revolution set. Along with Zaborg The Thunder Monarch and a few other Light and Dark attribute monsters being released, this allowed players to create competitive Chaos Decks once again, but this time with Chaos Sorcerer's. With its effect being a slightly weaker version of Black Luster Solder's but still being effective, Chaos Sorcerer quickly rose to being in the Top 8 decks for many tournaments until it too was banned. An update to the Forbidden list moved a new version of "Chaos Sorcerer" from the Forbidden status to Limited. The effect has been changed so that it cannot be Normal Summoned or Set.
Although Chaos as an archetype is now non-existent in competitive play, weaker versions of the Chaos monsters have been released such as Demise, King of Armageddon and Ruin, Queen of Oblivion. Various other monsters relying on summoning by removing cards in the graveyard from play are also commonly released, such as the Sky Scourges, two of which have abilities that mirror the abilities of Black Luster Soldier and Chaos Emperor Dragon.
Both of the Envoys are also used in the Yu-Gi-Oh! anime. Black Luster Soldier - Envoy of the Beginning and Chaos Emperor Dragon - Envoy of the End were in the decks of the characters, Yugi and Kaiba, respectively in the original Yu-Gi-Oh series. Black Luster Soldier made an appearance and was played by the character Dimitri in the Yu-Gi-Oh! GX series, while he was using Yugi's stolen deck (although Yugi himself never used the card. Chaos Emperor Dragon was used by Kaiba against the character, Zigfried von Schroeder.
Main Article: Archfiend; Yu-Gi-Oh! Archetype Cards
