Mana Vault [Kaladesh Inventions] Grand Prix Promos return the first card to

return the first card to the battlefield under its owner's control at the beginning of the next end step

{T}: Regenerate target creature

Karma deals damage to that player equal to the number of Swamps they control

Hail from Tolaria the ever changing 'Dane

Then each player reveals their chosen card

Mana Vault [Kaladesh Inventions] Grand Prix Promos return the first card toSet: Kaladesh Inventions Type: Artifact Rarity: Mythic 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}.