Flash of Demon Sword - VS01-023 - U Tweet Out of stock. Wishlist Details Attribute: Fire Card Effect: [Trigger] When a J/resonator you control attacks: Target resonator cannot block until end of turn. If you control a J-ruler, this card deals, damage equal to its ATK to that resonator. Card Name: Flash of Demon Sword Card Number: VS01-023 Card Type: Spell: Chant-Standby Cost: F1 Rarity: U Set Name: Alice Cluster Starter Deck Finish: Regular