Wall of Stone [30th Anniversary Edition] Water Seven or the first Otter spell

or the first Otter spell other than Alania you've cast this turn

whose combined ATK equals exactly 4000

Set: Champion Pack 2 Card type: Normal Spell Rarity: Super Rare Attack: 0 Defense: 0 Destroy 1 face-up monster with the highest DEF on your opponent's side of the field

Set: Tactical Evolution Card type: Effect Monster Rarity: Secret Rare Attack: 2400 Defense: 1000 You can Special Summon this card by Tributing 1 "Ocean's Keeper"

Championship Series Prize Cards Card type: Link/Effect Monster Rarity: Super Rare Attack: 0 2+ monsters

Wall of Stone [30th Anniversary Edition] Water Seven or the first Otter spellSet: 30th Anniversary Edition Type: Creature Wall Rarity: Uncommon Cost: {1}{R}{R} Defender (This creature can't attack.) The Earth herself lends her strength to these walls of living stone, which possess the stability of ancient mountains. These mighty bulwarks thwart ground based troops, providing welcome relief for weary warriors who defend the land.