Crystal Shark (Quarter Century Secret Rare) [RA03-EN031] Quarter Century Secret Rare

Set: Quarter Century Bonanza Card type: Effect Monster Rarity: Quarter Century Secret Rare Attack: 1100 Defense: 800 If this card is used for the Xyz Summon of a "Number" monster, it can be treated as a Level 3 or 4 monster. If this card is in your hand or GY: You can target 1 WATER monster on the field; Special Summon this card (but banish this card when it leaves the field), and if you do, halve that monster's ATK, also, you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Xyz Monsters. You can only use this effect of "Crystal Shark" once per turn.