Edison format ruling
Maiden of the Aqua
Card effect (current official text)As long as this card remains face-up on the field, the field is treated as "Umi" (however there is no increasing or decreasing of ATK/DEF due to "Umi"'s effect). If there is an active Field Spell Card on the field, this effect is not applied.
Rulings
- The effect of Maiden of the Aqua is active only when there is no face-up Field Spell Card on the field. When a Field Spell Card is activated after Maiden of the Aqua is Summoned, the effect of Maiden of the Aqua is negated as long as there is a face-up Field Spell Card. If the only Field Spell Card is face-down, the effect of Maiden of the Aqua is active. If there is a face-up Field Spell Card but it is negated by Imperial Order, the effect of Maiden of the Aqua is not active.
- If a Field Spell Card is already active, and Maiden of the Aqua is Summoned, the existing Field Spell Card continues to function and Maiden of the Aqua’s effect is not applied until there is no face-up Field Spell Card.
- While Maiden of the Aqua is making the field Umi, you can activate Tornado Wall but if Maiden of the Aqua is destroyed, Tornado Wall is also destroyed.
- If Maiden of the Aqua, Umi, and Tornado Wall are all on your side of the field, and Umi is destroyed, Tornado Wall is not destroyed because Maiden of the Aqua treats the field as Umi as soon as Umi leaves play.
- If you have Maiden of the Aqua (with her effect active) and The Legendary Fisherman or Deepsea Warrior on your side of the field, and Dark Hole is activated, The Legendary Fisherman and Deepsea Warrior will not be destroyed.
- If you have Maiden of the Aqua and Tornado Wall on the field, and Maiden of the Aqua is attacked by Dark Driceratops and Battle Damage would be inflicted, Tornado Wall still prevents the damage during damage calculation, as Maiden of the Aqua will remain on the field until the end of the Damage Step.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.