Mana Vault [Revised Edition] Magic Player Rewards 2007 The same is true for

The same is true for creature spells you control and creature cards you own that aren't on the battlefield

This effect can't reduce the mana in that cost to less than one mana

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Set: Alpha Edition Type: Creature — Specter Rarity: Uncommon Cost: {1}{B}{B} Flying

Mana Vault [Revised Edition] Magic Player Rewards 2007 The same is true forSet: Revised 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}.