City of Shadows

Land   

, Exile a creature you control: Put a storage counter on City of Shadows. : Add to your mana pool, where X is the number of storage counters on City of Shadows.

206 ME3 • ENTom Wänerstrand

™ & © 1993—2009 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

City of Shadows Land {T}, Exile a creature you control: Put a storage counter on City of Shadows. {T}: Add {C} to your mana pool for each storage counter on City of Shadows.

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10/4/2004
The storage counters aren't removed when you activate the mana ability.
10/1/2009
You can activate City of Shadows's second ability while it has no storage counters on it, though it won't add any mana to your mana pool in this case. You've still tapped it for mana, though, in case any abilities (such as the ability of a Fertile Ground enchanting it) care about that.

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