Walking Ballista [Aether Revolt Prerelease Promos] Bird reveal the top X cards

reveal the top X cards of your library

Set: Commander's Arsenal Type: Enchantment Rarity: Rare Cost: {1}{G} At the beginning of your draw step

Set: San Diego Comic-Con 2017 Type: Legendary Planeswalker — Nissa Rarity: Mythic Cost: {X}{G}{U} +2: Scry 2

If it's a land card or a creature card with mana value less than or equal to the number of loyalty counters on Nissa

Walking Ballista [Aether Revolt Prerelease Promos] Bird reveal the top X cardsSet: 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.