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TCG Rulings

Mentions in Other Rulings

OCG Rulings

  • The effect "Each of your opponent's monsters that conducted an attack while this card was face-up on the field has its ATK halved" does not use a Chain Link.[1]
  • If a monster whose ATK is already halved by the effect of "Mirror Wall" attacks, after the attack that monster's ATK remains halved.[1]
  • "Summoned Skull" (2500 ATK) is equipped with "Axe of Despair" (increasing its ATK by 1000, giving it 3500 ATK total). If it attacks while the opponent controls "Mirror Wall", its ATK becomes 1750 (half of 3500). After that, if "Mystical Space Typhoon" is activated, destroying "Axe of Despair", its ATK becomes 1250 (half of 1250).[2]
  • While your opponent controls "Mirror Wall", if your monster equipped with "Megamorph" attacks, the ATK of the monster while equipped with "Megamorph" will be halved. If your LP are higher than your opponent's, the monster's ATK will be halved by "Megamorph", then halved again by "Mirror Wall". If your LP are higher than your opponent's, the monster's ATK will be doubled by "Megamorph", then that doubled ATK will be halved by "Mirror Wall".[3]
  • If a monster whose ATK is already halved by the effect of "Mirror Wall" attacks, its ATK will not be halved again (it will not become 1/4 of its ATK). However, if a monster if being affected by two copies of "Mirror Wall" at the same time, its ATK will be halved twice to become 1/4 of its ATK.[4]

Previously Official Rulings

  • If "Mirror Wall" is already face-up on the field when a monster declares an attack, "Mirror Wall" reduces the ATK of the attacking monster by half when the attack is declared.
  • If "Mirror Wall" is activated during an attack (including during the Damage Step), then it reduces the ATK of the attacking monster when "Mirror Wall" resolves. (Even though "Mirror Wall" normally reduces the attack by half when the attack is declared, it will still reduce the attack by half if you activate it after the attack is declared.)
  • If "Mirror Wall" halves the ATK of a monster, it remains halved as long as "Mirror Wall" remains face-up on the field. If "Mirror Wall" is removed from the field, the ATK of the monsters is restored.
  • If you have 2 copies of "Mirror Wall", and a monster attacks, its ATK is one-quarter. So “Blue-Eyes White Dragon” would have 750 ATK, for example. If 1 of the "Mirror Wall" copies leaves play, then the ATK is increased to half (if both copies leave play, the ATK is restored to full.)

Mentions in Other Rulings

  • Shrink: If a monster affected by "Shrink" attacks while "Mirror Wall" is in play, both effects are applied and the monster's ATK becomes 1/4 its original ATK. Because "Mirror Wall" continually recalculates, the result is the same no matter which card is activated first.
  • The Hunter with 7 Weapons: When you declare an attack with this card against a monster of the selected Type, and the opponent activates "Mirror Wall", the ATK will be halved first at attack declaration, and then increased by 1000 during damage calculation. So the final ATK will be 1500 = (1000/2) + 1000....


References

  1. 1.0 1.1 1.2 1.3 Konami OCG Card Database: Mirror Wall
  2. Konami OCG Card Database: "Summoned Skull" (2500 ATK) is equipped with "Axe of Despair" (increasing its ATK by 1000), and it attacks while the opponent controls "Mirror Wall". After that, "Mystical Space Typhoon" is activated, destroying "Axe of Despair". What happens to its ATK?
  3. Konami OCG Card Database: While your opponent controls "Mirror Wall", if your monster equipped with "Megamorph" attacks, what happens to its ATK?
  4. Konami OCG Card Database: If a monster whose ATK is already halved by the effect of "Mirror Wall" attacks, will its ATK be halved again?
  5. Konami Judge Program Forum: Individual Email Rulings VS Individual Card Rulings
  6. UDE FAQ: Individual Card Rulings [A-C]
  7. UDE FAQ: Individual Card Rulings [D-E]
  8. UDE FAQ: Individual Card Rulings [F-H]
  9. UDE FAQ: Individual Card Rulings [I-K]
  10. UDE FAQ: Individual Card Rulings [L-O]
  11. UDE FAQ: Individual Card Rulings [P-R]
  12. UDE FAQ: Individual Card Rulings [S-T]
  13. UDE FAQ: Individual Card Rulings [U-Z]
  14. UDE FAQ: SPECIFIC CARDS RULINGS

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