Chaos " Chaos " ( カオス " Kaosu " ) is an archetype of monsters that thematically combine LIGHT and DARK . Originally a series , the release of " Chaos Form " cemented its status as an archetype . As a result of their Japanese names , this archetype also contains the sub - archetypes " Black Luster Soldier " , " CXyz " and " Number C " . History . The most recognized cards in the archetype include : " Chaos Emperor Dragon - Envoy of the End " was the first of this trio to be sent to the Forbidden list , in September 2004 , known as one of , if not " the " most broken card of all time . The card was particularly infamous for its role in the Yata - Garasu Lockdown , a very deadly and broken Deck with the power to use just two cards to absolutely lockdown the opponent , making it impossible for them to play or even see a single one of their cards for the rest of the Duel . " Chaos " still continued to dominate the metagame for the next 12 months . The year 2005 saw a " Chaos Phoenix " Deck using " Black Luster Soldier - Envoy of the Beginning " and " Sacred Phoenix of Nephthys " which proceeded to win the 2005 World Championship , showing that " Black Luster Soldier - Envoy of the Beginning " , even if Limited to 1 , was still far too powerful to be allowed in the Advanced Format . In September 2005 , " Black Luster Soldier - Envoy of the Beginning " was Forbidden ( and would remain so for six more years ) . The next 12 months saw the emergence of the strongest " Chaos " Metagame since " Invasion of Chaos " . This style of " Chaos " revolved around " Chaos Sorcerer " , which was still Unlimited , combined with the flexibility and power of the " Monarch s " . " Chaos Sorcerer " was eventually Forbidden in September 2006 . The " Chaos " ideal was left untouched until the release of " Force of the Breaker " , where the " Chaos " era was reborn with the " Sky Scourge s " , two monsters whose effects were based on " Chaos Emperor Dragon - Envoy of the End " and " Black Luster Soldier - Envoy of the Beginning " , with a third that was able to " choose " between the effects of " Jinzo " or " Spell Canceller " . Neither of the new " Chaos " replacements made much of an impact , and have long since been condemned to the unused Card Pool on account of their Summoning Conditions being unworkable and situational . More recently , a Deck based around " Sky Scourge Norleras " and " Phantom of Chaos " has been seeing more play after it topped a regional ( September ) . " Chaos " saw a return with " Chaos Sorcerer " being Semi - Limited in the " OCG " s September 2009 Lists and the use of " Dark Armed Dragon " and " Judgment Dragon " . However , " Chaos Sorcerer " was back to being Limited in the " OCG " s March 2010 Lists . In the September 2010 Lists , " Chaos Sorcerer " was back again to Semi - Limited . " Chaos Sorcerer " has been Unlimited in the March 2011 Lists . However , it was back to Limited again in the September 2012 Lists . In the following September 2011 Lists , " Black Luster Soldier - Envoy of the Beginning " was Limited after 6 years of being Forbidden . A new Synchro Monster , " Chaos Goddess " , was released in " The Shining Darkness " . It is capable of Summoning Level 5 or higher DARK monsters to the field by discarding a LIGHT monster from the hand . However , the fact that it requires a LIGHT Tuner and two non - Tuner DARK monsters makes it tricky to get out . A museum scene in the " Yu - Gi - Oh ! ZEXAL " anime features an exhibit including the card " Chaos End Ruler - Ruler of the Beginning and the End " , whose effect partially merges and upgrades that of both " Black Luster Soldier - Envoy of the Beginning " and " Chaos Emperor Dragon - Envoy of the End " . Needless to say , its effect is significantly more powerful and broken than any other card . Given that the card was not even played in the anime and only displayed , it is not expected to ever be released and was likely intended as merely a cameo or reference . Twilight / Chaos . This build focuses on milling the Deck to use " Lightsworn " monsters and Summon " Judgment Dragon " while at the same time placing DARK monsters in the Graveyard in order to Summon " Dark Armed Dragon " . Since the milling effect can place vital monsters in the Graveyard , the build also makes use of Graveyard control cards such as " Monster Reincarnation " and " Necro Gardna " to make sure that the required cards end up in the hand and Graveyard . With the high amounts of DARK and LIGHT monsters being sent to the Graveyard , " Chaos Sorcerer " can work very well in this Deck , as can " Chaos Necromancer " due to the number of cards that are always being dumped . " Tragoedia " is another important monster for the Deck , offering protection from OTK s , versatility as a Synchro Material Monster and the potential to become a huge beatstick , provided that the player has enough cards in their hand . Chaos Counter . Counter Fairies can be quite potent when combined with DARK Counter Trap support . " Black Luster Soldier - Envoy of the Beginning " and " Chaos Sorcerer " are quite easy to Summon as a result of the discard ing .