If Walking Ballista has been dealt damage or had its toughness reduced by an effect, this limits how many times you'll be able to remove +1/+1 counters from it in a single turn. For example, if it has three +1/+1 counters on it and has been dealt 1 damage this turn, it will be destroyed immediately after you activate the ability a second time and you won't be able to activate it a third time.
A casting cost of {X}{X} means that you pay twice X. If you want X to be 3, you pay {6} to cast Walking Ballista.
Last observed on Scryfall 2 months ago at $11.81. Over the trailing 90 days the price moved between $0.64 and $12.85 across 54 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from AER — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #181 of *Aether Revolt*, the set that shipped alongside the January 2017 Aether Revolt release.
Card type: Artifact Creature — Construct, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {X}{X} (0 converted).
Legal in Modern, Legacy, Vintage, and Commander. Banned in Pioneer.
EDHrec ranks this card #456 in Commander, putting it in the popular-include tier of the format's playable pool.
Illustrated by Daniel Ljunggren. Rarix catalogs 792 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Daniel Ljunggren
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
