Text:
: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
Rulings:
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10/4/2004
If you have at least one of each of the three Urza’s lands on the battlefield, you must take the 2 mana instead of just one.
Legality:
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standard: Not legal
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future: Not legal
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frontier: Not legal
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modern: Legal
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legacy: Legal
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pauper: Legal
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vintage: Legal
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penny: Not legal
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commander: Legal
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1v1: Legal
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duel: Legal
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brawl: Not legal
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oldschool: Not legal
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historic: Not legal
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pioneer: Not legal
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gladiator: Not legal
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premodern: Legal
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historicbrawl: Not legal
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paupercommander: Legal
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alchemy: Not legal
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explorer: Not legal
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predh: Legal
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oathbreaker: Legal