Mana Vault [Limited Edition Alpha] Cyberse Set: World Championship 2010 Card

Set: World Championship 2010 Card Pack Card type: Effect Monster Rarity: Rare Attack: 2900 Defense: 1600 This card cannot be Normal Summoned or Set

Set: Structure Deck: Deluxe Edition Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 1000 This card cannot be Normal Summoned or Set

destroy 1 face-down card on the field

They never keep it for long

Mana Vault [Limited Edition Alpha] Cyberse Set: World Championship 2010 CardSet: Limited Edition Alpha Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.