Fortress Whale [STP2-EN006] Ultra Rare Photon Hypernova also it cannot be destroyed

also it cannot be destroyed by battle

Set: Demo Deck 2016 Card type: Flip/Effect Monster Rarity: Common Attack: 450 Defense: 600 FLIP: Target 1 monster your opponent controls

then immediately after this effect resolves

Set: Maze of Memories Card type: Xyz/Effect Monster Rarity: Collector's Rare Attack: 0 Defense: 2000 2 Level 4 monsters If this card is Special Summoned: You can target 1 "Number" Xyz Monster in your GY

Fortress Whale [STP2-EN006] Ultra Rare Photon Hypernova also it cannot be destroyedSet: Speed Duel: Tournament Pack 2 Card type: Ritual Monster Rarity: Ultra Rare Attack: 2350 Defense: 2150 You can Ritual Summon this card with "Fortress Whale's Oath".