Hydrogeddon [CP04-EN005] Super Rare Psychic then all monsters your opponent

then all monsters your opponent currently controls lose 300 ATK

Set: Legendary Collection Kaiba Card type: Quick Play Spell Rarity: Secret Rare Target 1 Dragon-Type Normal Monster in your GY

Set: Structure Deck: Lair of Darkness Card type: Effect Monster Rarity: Common Attack: 500 Defense: 2000 You can Tribute any number of DARK monsters

During your End Phase: You can Special Summon 1 Flip monster from your hand or Graveyard in face-down Defense Position

then select 1 card and return it to his/her Deck

Hydrogeddon [CP04-EN005] Super Rare Psychic then all monsters your opponentSet: Champion Pack 4 Card type: Effect Monster Rarity: Super Rare Attack: 1600 Defense: 1000 When this card destroys an opponent's monster by battle and sends it to the Graveyard, you can Special Summon 1 "Hydrogeddon" from your Deck.