Phyrexian Portal 
Text:
: If your library has ten or more cards in it, target opponent looks at the top ten cards of your library and separates them into two face-down piles. Exile one of those piles. Search the other pile for a card, put it into your hand, then shuffle the rest of that pile into your library.
Rulings:
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10/4/2004
The two piles don’t have to have the same number of cards in them. One of the piles may have zero cards.
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: Not legal
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legacy: Legal
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pauper: Not 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: 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
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timeless: Not legal
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standardbrawl: Not legal
