Mana Vault [Beta Edition] Happy Holidays Creatures with swampwalk can be

Creatures with swampwalk can be blocked as though they didn't have swampwalk

Set: Mirrodin Type: Creature — Human Wizard Rarity: Rare Cost: {1}{U}{U} At the beginning of each opponent's upkeep

then puts all cards they exiled this way onto the battlefield

Set: Unlimited Edition Type: Sorcery Rarity: Rare Cost: {2}{U} Each player shuffles their hand and graveyard into their library

Mana Vault [Beta Edition] Happy Holidays Creatures with swampwalk can beSet: Beta 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}.