Mana Vault [Alpha Edition] Yu-Gi-Oh! Championship Series Prize Cards The DEF of the selected

The DEF of the selected monster becomes equal to the combined original DEF of all face-up monsters on your side of the field

and "Gamma The Magnet Warrior" from your hand and/or your side of the field

untap those creatures

Pay 1 life: Exile the top card of your library face down

Source 1: Legions booster pack purchase bonus (2003)

Mana Vault [Alpha Edition] Yu-Gi-Oh! Championship Series Prize Cards The DEF of the selectedSet: Alpha Edition 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}.