Forcefield 
Text:
: The next time an unblocked creature of your choice would deal combat damage to you this turn, prevent all but 1 of that damage.
Rulings:
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10/4/2004
This can’t be used to prevent damage caused by a blocked creature with Trample ability.
Legality:
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standard: Not legal
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future: Not legal
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frontier: Not legal
-
modern: Not legal
-
legacy: Legal
-
pauper: Not legal
-
vintage: Legal
-
penny: Not legal
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commander: Legal
-
1v1: Legal
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duel: Legal
-
brawl: Not legal
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oldschool: Not legal
-
historic: Not legal
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pioneer: Not legal
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gladiator: Not legal
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premodern: Not legal
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historicbrawl: Not legal
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paupercommander: Not 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
