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[]
All-Star[]
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 |
| Ar, Natural Element 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 Spirit Queen | December 10, 2018 | December 20, 2018 |
| The Twister and Echidona, Phantom Dragon | December 13, 2019 | December 21, 2019 |
| Holy Grand Slam and Become You | April 30, 2021 | May 7, 2021 |
| Holy Grand Slam and Surrounded by Flames | April 30, 2021 | May 7, 2021 |
| Mayu, Genesis Key Miko and Mel-Martini | June 21, 2024 | July 22, 2024 |
| Mayu, Genesis Key Miko and Ril, Memory of True Feelings | June 21, 2024 | July 22, 2024 |
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.
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 Planet | December 10, 2018 | December 20, 2018 |
| DYNAMITE | December 10, 2018 | December 20, 2018 |
| Shiva, Roaring Fang of Transgression | April 30, 2021 | May 7, 2021 |
| Hinanigisu, Water Phantom | April 30, 2021 | May 7, 2021 |
| Coela, Water Phantom | April 30, 2021 | May 7, 2021 |
You may not include these cards in your deck at all.
Key Selection[]
Simultaneous Use Restriction[]
| Cards | Announcement Date | Effect Date |
|---|---|---|
| Holy Grand Slam and Become You | April 30, 2021 | May 7, 2021 |
| Holy Grand Slam and Surrounded by Flames | April 30, 2021 | May 7, 2021 |
| Mayu, Genesis Key Miko and Ril, Memory of True Feelings | June 21, 2024 | July 22, 2024 |
You may not have both cards from each of these pairs in your deck. Both the main deck and LRIG deck are included.
Diva Selection[]
Simultaneous Use Restriction[]
| Cards | Announcement Date | Effect Date |
|---|---|---|
| LRIG cards with the same LRIG type but different colors (e.g. a level 0 black Tama and a level 1 white Tama) | January 13, 2023 | February 11, 2023 |
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 of ARTS cards to 1 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.
