WALKING BALLISTA X4 Aether Revolt AER Magic MTG MINT CARD. You will receive all these 4 cards-(a play set) for each order. Walking Ballista enters the battlefield with X +1/+1 counters on it. Put a +1/+1 counter on Walking Ballista. Remove a +1/+1 counter from Walking Ballista: It deals 1 damage to target creature or […]