Mirrorpool [Oath of the Gatewatch Prerelease Promos] Horror they are actually extremely social

they are actually extremely social animals

If you control an Urza's Mine and an Urza's Tower

melted down

Mines became common as cities during the days of the artificers

−6: You get an emblem with "Whenever a land enters the battlefield under your control

Mirrorpool [Oath of the Gatewatch Prerelease Promos] Horror they are actually extremely socialSet: 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.