Mirrorpool [Oath of the Gatewatch Prerelease Promos] World Enchantment and permanents are the chosen

and permanents are the chosen color in addition to their other colors

you draw a card

Set: Limited Edition Beta Type: Artifact Rarity: Uncommon Cost: {3} Basalt Monolith doesn't untap during your untap step

untap the creature

Set: Unhinged Type: Artifact Rarity: Rare Cost: {6} When Letter Bomb enters the battlefield

Mirrorpool [Oath of the Gatewatch Prerelease Promos] World Enchantment and permanents are the chosenSet: Oath of the Gatewatch Prerelease Promos Type: Land Rarity: Mythic Mirrorpool enters the battlefield tapped. {T}: Add {C}. {2}{C}, {T}, Sacrifice Mirrorpool: Copy target instant or sorcery spell you control. You may choose new targets for the copy. {4}{C}, {T}, Sacrifice Mirrorpool: Create a token that's a copy of target creature you control.