Mana Vault [Fifth Edition] Eldrazi Set: Vanguard Series Type: Vanguard

Set: Vanguard Series Type: Vanguard Rarity: Rare Whenever a creature deals damage to you

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Warrior Rarity: Rare Cost: {5}{R} Haste

but my host would casually push it down before I could make out what it was

That land is a Swamp for as long as it has a mire counter on it

Mana Vault [Fifth Edition] Eldrazi Set: Vanguard Series Type: VanguardSet: Fifth 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}.