Mana Vault [Fourth Edition] Vraska but I didn't expect it

but I didn't expect it from the building itself

{1}: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn

When Argoth suffers

Put the chosen cards on top of your library in any order

"There will come a time when the only prey left will be each other

Mana Vault [Fourth Edition] Vraska but I didn't expect itSet: 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}.