Walking Ballista is a rare Artifact Creature — Construct card from Magic: The Gathering (Magic Online Promos, PRM).
Rare
Magic Online Promos (PRM)
{X}{X}
Power / Toughness
0 / 0
Mana Value
0
Card Text
This creature enters with X +1/+1 counters on it.
{4}: Put a +1/+1 counter on this creature.
Remove a +1/+1 counter from this creature: It deals 1 damage to any target.
