
CompanionCompanionIf this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery. — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for
as a sorcery.)
FlyingFlyingCan only be blocked by creatures with flying or reach.
When Yorion enters, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step.
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.