Voltaic Key [Urza's Saga] Effect Fusion Monster Set: Duelist Pack: Yugi Card

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

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

Set: EX: Dragon Type: Colorless Rarity: Uncommon Retreat cost: Colorless

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: Duelist Pack: Yugi CardSet: 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.