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Chronomaly "Golden Jet", "Crystal Chrononaut" and "Colossal Head", in the artwork of "Chronomaly Pyramid Eye Tablet"
  • 先史遺産オーパーツ
  • 先史遺産 (base)
  • オーパーツ (ruby)
  • Ōpātsu (romanized)
  • OOPArts (translated)
  • オーパーツ
  • Chronomal
  • Chronomal
  • Cronomalia
  • 오파츠
  • Opacheu (romanized)
  • OOPArts (translated)
  • Cronomalia
  • Cronómalo
  • Cronómala
Anime appearances

"Chronomaly", known as "OOPArts" (先史遺産オーパーツ Ōpātsu or 오파츠 Opacheu) in Japan or Korea, is an archetype of cards used by Trey in the Yu-Gi-Oh! ZEXAL anime. Most are either EARTH or LIGHT, as well as either Machine or Rock (except for Chronomaly Crystal Chrononaut which is Psychic.)

Their effects support each other well, enabling quick swarming and Xyz Summons of Rank 5 Xyz Monsters, particularly through the LIGHT monsters.



Most "Chronomaly" monsters are based on and resemble various artifacts.


The OCG name, "OOPArts", is an acronym for "Out-Of-Place Artifact", a term used to describe artifacts that make no logical sense given the technology available at the time they were created. Such objects were also featured as part of the "Ancient Treasure" series in the Yu-Gi-Oh! 5D's anime. The TCG name, "Chronomaly", is a portmanteau of the word "chronology" which is the sequential order in which past events occur and "anomaly" as in an irregularity or something odd. Put together these monsters are "chronological anomalies" or "chronomalies" since these objects deviate from what would have been possible to create given the resources and technology available at that time.


Chronomaly Origin
Acambaro Figures Acámbaro figures
Aztec Mask Golem Teotihuacan
Cabrera Trebuchet Ica Stones
Colossal Head Olmec colossal heads
Crystal Bones Actun Tunichil Muknal
Crystal Skull Crystal skull
Golden Jet Quimbaya Airplane Artifact
Gordian Knot Gordian Knot
Mayan Machine K'inich Janaab' Pakal
Magella Globe Magellan expedition
Moai Moai
Moai Carrier
Mud Golem Dogū
Nebra Disk Nebra sky disk
Sol Monolith Aztec calendar stone
Tula Guardian Tula
Tuspa Rocket Istanbul rocket
Winged Sphinx Great Sphinx of Giza
Atlandis Atlantis + Atlas
Chaos Atlandis
Chateau Huyuk Çatalhöyük
Crystal Chrononaut Ancient astronauts
Machu Mech Machu Picchu
Vimana Vimana


Card Origin
Antikythira Gear Antikythera mechanism
Chronomaly City Babylon Babylon
Chronomaly Esperanza Glyph Esperanza Stone
Chronomaly Ley Line Power Ley line
Chronomaly Temple - Trilithon Trilithon
Chronomaly Pyramid Eye Tablet Emerald Tablet
Chronomaly Technology Ancient technology
Orichalcum Chain Orichalcum
Orichalcum Mirage
Palenque Sarcophagus Palenque
Stone Bola Stone spheres of Costa Rica
Stonehenge Methods Stonehenge
Stonehenge Shield
Sunken Kingdom Atlantis
Thunder Pot Baghdad Battery

Playing style[edit]

"Chronomaly" monsters are focused on Xyz Summoning a wide range of Xyz Monsters. Many of their effects allow Special Summoning of more "Chronomaly" monsters.

Chronomaly OTK[edit]

This Deck focuses on using the effects of "Number 33: Chronomaly Machu Mech" and "Number 36: Chronomaly Chateau Huyuk" to perform a One Turn Kill.

What you need:

  • Four monsters in your field (two needs to be Level 5 and the others Level 4)
  • "Number 33: Chronomaly Machu Mech" and "Number 36: Chronomaly Chateau Huyuk" in the Extra Deck
  • Your opponent has a monster with 1800 or more ATK

How it works:

  • The four monsters you need are: two Level 5 to Summon "Chronomaly Machu Mech" and another two Level 4 to Summon "Chronomaly Chateau Huyuk":
  • Xyz Summon "Chronomaly Machu Mech" using the two Level 5 monsters and "Chronomaly Chateau Huyuk" using the two Level 4 monsters.
  • Activate the effect of "Chronomaly Chateau Huyuk", target 1 of your opponent's monsters with at least 1800 ATK. The targeted monster's ATK becomes 0.
    • All following calculations will be done with the assumption that that monster had exactly 1800 ATK.
  • Use the effect of "Chronomaly Machu Mech" on the monster that was targeted by the effect of "Chronomaly Chateau Huyuk" to inflict 1800 effect damage to your opponent. Then "Chronomaly Machu Mech" gains ATK equal to the amount of damage inflicted. This makes its total ATK 4200.
  • Enter the Battle Phase and attack your opponent's monster that was targeted by "Chronomaly Chateau Huyuk", then attack directly dealing a total of 6000 damage.

1800 (the first effect of "Chronomaly Machu Mech") + 4200 (the ATK of "Chronomaly Machu Mech") + 2000 (the ATK of "Chronomaly Chateau Huyuk") = 8000 damage


Official Decks[edit]

From Let's built a Chronomaly Deck (June 13, 2012):


Since most "Chronomaly" cards involve swarming, mass-removal cards like "Dark Hole", "Torrential Tribute" and "Deck Devastation Virus" can interdict "Chronomaly" monsters before they have a chance to infest the field with the latter-most aforementioned card perhaps being the deadliest to this Deck due to the card's lingering effect and all the non-Xyz "Chronomaly" monsters (except "Winged Sphinx") sporting 1500 or less ATK. "Light-Imprisoning Mirror" also poses a threat to their swarming and effects, as most "Chronomaly" monsters have LIGHT as their Attribute. However, "Mind Drain" can be worse in countering their Special Summoning as a lot of key Level 5 "Chronomaly" monsters (i.e. "Moai" and "Moai Carrier") are helpful in Xyz Summoning "Machu Mech".

In addition, cards like "Summon Limit", "Narrow Pass" and any cards that render Monster Card Zones useless (i.e. "Ground Collapse") can bar them from the field completely ("Summon Breaker" can also flat-out pause a spamming "Chronomaly" player's turn completely). In fact, these countermeasures, combined with anti-Special Summoning support, can almost completely shut down "Chronomaly" Decks. Finally, most "Chronomaly" monsters have scanty DEF—if "Chronomaly" Duelists go on the defensive, Defense Position-destroying card effects and piercing cards can be added boon against "Chronomaly" Decks. If you want to go on the defensive use "Giant Soldier of Steel" in your Extra Deck against burns and monsters with 1900 or more ATK.