Red Cocoon [HSRD-EN026] Common Legendary Hero Decks You can only use each

You can only use each effect of "Neptabyss

when this card that was Tribute Summoned by Tributing an "Ancient Gear" monster battles an opponent's monster

Set: Primal Origin Card type: Effect Monster Rarity: Rare Attack: 100 Defense: 300 When this card is Normal Summoned: You can add 1 Level 3

Set: Structure Deck: Realm of Light Card type: Normal Spell Rarity: Common Discard 1 "Lightsworn" monster

Then Xyz Summon

Red Cocoon [HSRD-EN026] Common Legendary Hero Decks You can only use eachSet: High Speed Riders Card type: Normal Trap Rarity: Common Target 1 Dragon Type Synchro Monster you control; equip this card to it. If it battles an opponent's monster, negate the effects of all face up monsters your opponent controls until the end of the Damage Step. During the End Phase, if this card is in your Graveyard because it was sent there this turn: You can target 1 "Red Dragon Archfiend" in your Graveyard; Special Summon it.