Walking Ballista (Prerelease) [Aether Revolt Prerelease Promos] BT9-100 and Locus lands you control

and Locus lands you control

you may play a land or cast a permanent spell from among cards in your graveyard that were put there from your library this turn

reveal Progenitus and shuffle it into its owner's library instead

• Target opponent discards a card

Walking Ballista (Prerelease) [Aether Revolt Prerelease Promos] BT9-100 and Locus lands you controlSet: Aether Revolt Prerelease Promos Type: Artifact Creature Construct Rarity: Rare Cost: {X}{X} Walking Ballista enters the battlefield with X +1 +1 counters on it. {4}: Put a +1 +1 counter on Walking Ballista. Remove a +1 +1 counter from Walking Ballista: It deals 1 damage to any target.