You can activate City of Shadows's second ability while it has no storage counters on it, though it won't add any mana in this case. You did not tap it for mana, though, in case any abilities (such as the ability of a Fertile Ground enchanting it) care about that.
The storage counters aren't removed when you activate the mana ability.
This printing is one of 3 catalogued treatments from ME3 — 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 #206 of *Masters Edition III*, the set that shipped alongside the September 2009 Masters Edition III release.
Card type: Land, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters.
Legal in Legacy, Vintage, and Commander. This printing is on Wizards of the Coast's Reserved List — Wizards has committed never to reprint cards on that list, which underwrites a structural scarcity floor on every surviving copy.
EDHrec ranks this card #16,207 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Tom Wänerstrand. Rarix catalogs 255 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Tom Wänerstrand
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
