Gouki Iron Claw [ETCO-EN004] Common Dark Revelation Volume 1 during battle between that Synchro

during battle between that Synchro Monster and a Defense Position monster whose DEF is lower than the ATK of that Synchro Monster

Set: Savage Strike Card type: Effect Monster Rarity: Common Attack: 2000 Defense: 1000 If this Tribute Summoned card battles an opponent's monster

Set: Judgment of the Light Card type: Effect Monster Rarity: Secret Rare Attack: 2900 Defense: 2400 When this card is Special Summoned by the effect of a Spellcaster-Type monster or a "Spellbook" Spell Card: You can target 2 "Spellbook" Spell Cards in your Graveyard

Set: The Lost Millennium Card type: Effect Monster Rarity: Ultimate Rare Attack: 100 Defense: 1800 You can flip this card into face-down Defense Position once per turn during your Main Phase

Choose 1 card your opponent controls or 1 in their hand (you can look at their hand)

Gouki Iron Claw [ETCO-EN004] Common Dark Revelation Volume 1 during battle between that SynchroSet: Eternity Code Card type: Effect Monster Rarity: Common Attack: 1000 Defense: 0 During the Damage Step, when your "Gouki" monster battles an opponent's monster (Quick Effect): You can send this card from your hand to the GY; until the end of this turn, your monster gains 500 ATK, and if it does, it is unaffected by your opponent's card effects. If this card is sent from the field to the GY: You can add 1 "Gouki" card from your Deck to your hand,