Edison format ruling
Neo-Spacian Aqua Dolphin
Card effect (current official text)Once per turn: You can discard 1 card; look at your opponent's hand and choose 1 monster. If you control a monster with ATK greater than or equal to the ATK of the chosen card, destroy the chosen card, and if you do, inflict 500 damage to your opponent. Otherwise, take 500 damage.
Rulings
- This effect does not target.
- When this effect resolves you look at your opponent’s hand. If there are no Monster Cards, do nothing. If the opponent does have a Monster Card, and you have a monster on the field with greater or equal ATK, you will destroy the opponent’s Monster Card and inflict the 500 damage at the same time.
- If the selected Monster Card in your opponent’s hand has ATK ?, since it is undetermined, you cannot control a monster with greater or equal ATK, and you will take 500 damage.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.