Wind-Up Shark (Quarter Century Secret Rare) (RA04-EN180) [Quarter Century Stampede]

When a "Wind-Up" monster is Normal or Special Summoned to your side of the field: You can Special Summon this card from your hand. Once per turn: You can activate 1 of these effects.<br>• Increase this card's Level by 1, until the End Phase.<br>• Reduce this card's Level by 1, until the End Phase.