Mana Vault [Collectors' Edition] Magic Origins Prerelease Promos At end of combat

At end of combat

Set: Time Spiral Timeshifted Type: Creature — Merfolk Rarity: Rare Cost: {U}{U} Other Merfolk get +1/+1 and have islandwalk

{T}: Take an extra turn after this one

Set: Alpha Edition Type: Instant Rarity: Common Cost: {X}{U} Counter target spell with mana value X

you may cast that card from exile without paying its mana cost

Mana Vault [Collectors' Edition] Magic Origins Prerelease Promos At end of combatSet: Collectors' 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}.