Target opponent puts the top thirteen cards of their library into their graveyard.
: Put Startled Awake from your graveyard onto the battlefield transformed. Activate this ability only any time you could cast a sorcery.
For more information on double-faced cards, see the Shadows over Innistrad mechanics article (http://magic.wizards.com/en/articles/archive/feature/shadows-over-innistrad-mechanics).
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