Flying
When Dream Strix becomes the target of a spell, sacrifice it.
When Dream Strix dies, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
If Dream Strix becomes the target of a spell, it will be sacrificed before that spell tries to resolve. If it is the only target of that spell, it will be removed from the stack rather than resolving, and no part of its instructions will be performed.
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wotc
If instructed to learn, you may do nothing. Discarding a card and putting a Lesson card into your hand are both optional.
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wotc
If you bring a card into the game from outside the game in a Sealed Deck or Booster Draft event, you may select only a card that is in the card pool that you built your deck from.
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wotc
If a card is brought into the game from outside the game, it will stay in the game until it ends or until its owner leaves the game, whichever comes first.
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wotc
If you bring a card into the game from outside the game in a Constructed tournament (or a Constructed game played under tournament conditions), you may select only a card from your sideboard. In casual Constructed games, the card comes from your collection.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.