Voltaic Key [Urza's Saga] Effect Fusion Monster Set: EX: Emerald Type: Psychic

Set: EX: Emerald Type: Psychic Rarity: Holo Rare Retreat cost: Colorless

Set: Duelist Pack: Yugi Card type: Trap Card Rarity: Ultra Rare Activate only when an opponent's monster declares an attack

destroy the face-down monster immediately with this card''s effect without flipping it face-up or damage calculation

if a Beast-Warrior-Type "Bujin" monster you control battles an opponent's monster: You can send this card from your hand to the Graveyard

Voltaic Key [Urza's Saga] Effect Fusion Monster Set: EX: Emerald Type: PsychicSet: Urza's Saga Type: Artifact Rarity: Uncommon Cost: {1} {1}, {T}: Untap target artifact. The key did not work on a single lock, yet it opened many doors.