Mana Vault [Fourth Edition] Champions of Kamigawa Set: World Magic Cup Qualifiers

Set: World Magic Cup Qualifiers Type: Instant Rarity: Rare Cost: {B}{G} This spell can't be countered

As dangerous in the gambling hall as he is in battle

Set: Onslaught Type: Enchantment Rarity: Rare Cost: {2}{R}{R} Whenever a creature enters the battlefield

Set: Portal Three Kingdoms Type: Creature — Ox Rarity: Uncommon Cost: {3}{G} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp

you may pay {W/B}

Mana Vault [Fourth Edition] Champions of Kamigawa Set: World Magic Cup QualifiersSet: Fourth 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}.