Walking Ballista [Aether Revolt] XY181 Set: Black & White: Boundaries

Set: Black & White: Boundaries Crossed Type: Item Rarity: Secret Rare

Set: Base Set 2 Type: Psychic Rarity: Rare Retreat cost: Colorless

You may put a green permanent card with converted mana cost X or less from among them onto the battlefield

Set: EX: Holon Phantoms Type: Metal Rarity: Common Retreat cost: Colorless

Boorish Herder enters the battlefield or attacks

Walking Ballista [Aether Revolt] XY181 Set: Black & White: BoundariesSet: Aether Revolt 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.