The mana produced by Karn's last ability can be spent on anything that isn't a nonartifact spell. This includes casting artifact spells, paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on.
Karn's last ability isn't a mana ability, even though it adds mana. It uses the stack and it can be responded to. Use the number of artifacts you control as the ability resolves to determine how much mana to add.
The ability that defines Karn's power and toughness works in all zones, not just the battlefield. As long as Karn is under your control and still an artifact, its own mana value will count. In most cases, it'll be at least 5/5.
Last observed on Scryfall 2 months ago at $17.39. Over the trailing 90 days the price moved between $0.02 and $22.99 across 325 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from MAT — the lineup includes Etched Foil 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 #149 of *March of the Machine: The Aftermath*, the set that shipped alongside the May 2023 March of the Machine: The Aftermath release.
Card type: Legendary Artifact Creature — Golem, printed at mythic. Mythic rares historically land in roughly one out of every eight boosters at standard print densities. Mana cost: {5} (5 converted).
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #2,580 in Commander, putting it in the niche-pick tier of the format's playable pool.
Illustrated by Grzegorz Rutkowski. Rarix catalogs 381 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Grzegorz Rutkowski
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
