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Mayu's Room (繭の部屋 Mayu no Heya) is the collective name for the set of rules that restrict the use of certain cards in tournaments for the purposes of game balance. These rules only officially apply to official tournaments; casual meetings and unofficial tournaments are not required to have these restrictions in place, although they can adopt these rules if they so wish.

Japanese

Simultaneous Use Restriction

Cards Announcement Date Effect Date
Blue Code Heart V@C and Resonance March November 20, 2015 November 21, 2015
Blue Code Heart V@C and Resonance November 20, 2015 November 21, 2015
Lock You and Fracturing Lust December 22, 2015 January 21, 2016
Lock You and Spirit Salvage December 22, 2015 January 21, 2016
Argon, Natural Source and MAGIC HAND December 22, 2015 January 21, 2016
Mayu, Genesis Miko and Mayu, True Name Miko December 22, 2015 January 21, 2016
Calm After the Typhoon and Code Ancients Hellboros July 8, 2016 August 4, 2016
CRYSTAL SEAL and Code Heart MPP April 8, 2017 April 26, 2017
Mayu, Genesis Miko and Mayu, Reunion Miko December 10, 2018 December 20, 2018
Mayu, True Name Miko and Mayu, Reunion Miko December 10, 2018 December 20, 2018
Code Eat Tonkatsu and Unicarn, Phantom Apparition Princess December 10, 2018 December 20, 2018

You may not have both cards from each of these pairs in your deck. Both the main deck and LRIG deck are included.

It does not matter how many of each card you put in. For example, if you have 4 CRYSTAL SEAL, you may not put Code Heart MPP in your deck. if you have 1 CRYSTAL SEAL, you may still not put Code Heart MPP in your deck.

Restriction to 2

Cards Announcement Date Effect Date

There are currently no cards restricted to 2 copies by Mayu's Room.

You could include any or all cards restricted to 2 in your deck; you just couldn't run three or more of any particular one.

Restriction to 1

Cards Announcement Date Effect Date

There are currently no cards restricted to 1 copy by Mayu's Room.

You could only have one copy of cards restricted to 1 in your deck. You may include any or all cards restricted this way in your deck; you just can't run two or more of any particular one.

Disabled

Cards Announcement Date Effect Date
No Gain August 21, 2015 September 17, 2015
Late Bloomer December 22, 2015 January 21, 2016
RAINY July 8, 2016 August 4, 2016
Surrounded by Fire July 8, 2016 August 4, 2016
Servant Z July 8, 2016 August 4, 2016
Code Art CL September 30, 2016 October 13, 2016
Repair April 8, 2017 April 26, 2017
⁑Merli⁑, Deluge of Water Currents December 10, 2018 December 20, 2018
Resurrection December 10, 2018 December 20, 2018
≡Geocentrism≡, Natural Star December 10, 2018 December 20, 2018
DYNAMITE December 10, 2018 December 20, 2018

You may not include these cards in your deck at all.

History

Cards Ban Type Announcement Date Effect Date New Ban Type Revocation Date
RAINY Restriction to 1 December 22, 2015 January 21, 2016 Disabled August 4, 2016
Code Art CL Restriction to 2 July 8, 2016 August 4, 2016 Disabled October 12, 2016
Osaki, Phantom Beast Deity and Repair Simultaneous Use Restriction August 8, 2014 August 28, 2014 Repair disabled April 26, 2017
Repair Restriction to 2 March 20, 2015 April 25, 2015 Disabled April 26, 2017
Lock You Restriction to 1 December 22, 2015 January 21, 2016 None; due to new LRIG Deck rules, restriction to 1 of ARTS cards is redundant April 26, 2018
Osaki, Phantom Beast Deity and THREE OUT Simultaneous Use Restriction August 8, 2014 August 28, 2014 Removed entirely October 25, 2018
Valkyrie, Unforgettable Fantasy Restriction to 2 March 20, 2015 April 25, 2015 Removed entirely October 25, 2018
Arcgain, Archangel of Pioneering Restriction to 2 March 20, 2015 April 25, 2015 Removed entirely October 25, 2018
Apato, Phantom Dragon Restriction to 2 September 30, 2016 October 13, 2016 Removed entirely October 25, 2018
Code Piruluk APEX and CRYSTAL SEAL Simultaneous Use Restriction April 8, 2017 April 26, 2017 Removed entirely October 25, 2018
Code Piruluk APEX and Code Heart MPP Simultaneous Use Restriction April 8, 2017 April 26, 2017 Removed entirely October 25, 2018
Burst Rush and DYNAMITE Simultaneous Use Restriction April 8, 2017 April 26, 2017 DYNAMITE disabled December 20, 2018

Chinese

These rules only officially apply to official tournaments.

Simultaneous Use Restriction

Cards Announcement Date Effect Date
Blue Code Heart V@C and Resonance March May 26, 2016 May 28, 2016
Blue Code Heart V@C and Resonance May 26, 2016 May 28, 2016

You may not have both cards from each of these pairs in your deck.

Restriction to 2

Cards Announcement Date Effect Date
Valkyrie, Unforgettable Fantasy September 6, 2015 September 18, 2015
Repair September 6, 2015 September 18, 2015
Arcgain, Archangel of Pioneering September 6, 2015 September 18, 2015

You may only have two or less copies of each of these cards in your deck.

Disabled

Cards Announcement Date Effect Date
No Gain April 14, 2016 April 23, 2016

You may not include these cards in your deck at all.

Gameplay
Colors White WhiteRed RedBlue BlueGreen GreenBlack Black
Not a Color Colorless Colorless
Card Types LRIGARTSSIGNISpellResonaKeyCraft
Parts of a Card LevelLimiting conditionUse Timing
Game Zones Check ZoneDeckEner zoneField (SIGNI zone, LRIG zone)
HandLife clothLRIG deckLRIG trashTrash
Game Mechanics AbilityAttackBanishCoinConvertCostCrushDamageDiscardDraw
ExcludeEner ChargeExceedFreezeGrowLife BurstUp/DownRefreshRemove
Keywords AccessoryAssassinBlood crystal armBeatBetChainCharmCross (Heaven)
DecorateDouble CrushEncoreGateGuardLancerLayerMulti EnerRide (Drive)
RiseSeed (Bloom) ● ShadowS LancerSubscriberTrapTriple CrushVirus
Miscellaneous FAQsFormats (Key SelectionAll-Star) ● Mayu's RoomRule processingTrigger ability

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