Citadel Whale

Level 7 WATER/Fish Effect
2350 ATK / 2150 DEF

If this card is in your hand or GY: You can Tribute 2 WATER monsters; Special Summon this card. You can only use this effect of "Citadel Whale" once per turn. If this card is Special Summoned: You can Set 1 "Sea Stealth Attack" directly from your Deck. Once per turn, when your opponent activates a card or effect that targets 1 WATER monster you control (and no other cards) (Quick Effect): You can negate the activation, and if you do, destroy that card.

Rulings – Yugipedia

Printings:

Legendary Duelists: LEDU-EN016 (Ultra Rare) - 2017-09-07
Legendary Duelists: Season 1: LDS1-EN027 (Ultra Rare) - 2020-07-02
Legendary Duelists: Duels From the Deep: LED9-EN026 (Common) - 2022-06-16

Prices:

Cardmarket: 0.07 €
TCGplayer: $ 0.13