Voltaic Key [Urza's Saga] Human Set: Planechase Type: Creature —

Set: Planechase Type: Creature — Zombie Rarity: Uncommon Cost: {2}{B}{B} Zombie spells you cast cost {1} less to cast

Set: Ravnica: City of Guilds Type: Land — Mountain Plains Rarity: Rare ({T}: Add {R} or {W}

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {0} {T}: Add {B}

Spend this mana only to cast a creature spell of the chosen type

Set: Beta Edition Type: Enchantment — Aura Rarity: Common Cost: {B} Enchant creature

Voltaic Key [Urza's Saga] Human Set: Planechase Type: Creature —Set: 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.