![Poseidon Wave [SDRE-EN039] Common](http://mediareload.net/cdn/shop/products/1c9ddff1-911f-58a5-a48b-003a46620abb_1024x1024.jpg?v=1709460397)
![Poseidon Wave [SDRE-EN039] Common](http://mediareload.net/cdn/shop/products/1c9ddff1-911f-58a5-a48b-003a46620abb_480x480.jpg?v=1709460397)
| Set: | Structure Deck: Realm of the Sea Emperor |
| Card type: | Normal Trap |
| Rarity: | Common |
| Attack: | 0 |
| Defense: | 0 |
When an opponent's monster declares an attack: Target the attacking monster; negate the attack, and if you do, inflict 800 damage to your opponent for each face-up Fish, Sea Serpent, or Aqua-Type monster you control.