What are the official rulings for Search for Azcanta // Azcanta, the Sunken Ruin?
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0. If a seventh card is put into your graveyard by something other than resolving Search for Azcanta’s triggered ability, you won’t transform it yet. You’ll have to wait until your next upkeep.
1. If you don’t put the top card of your library into your graveyard while resolving Search for Azcanta’s triggered ability, you’ll leave it on top of your library (and probably draw it during your draw step).
2. If you have seven or more cards in your graveyard, you may transform Search for Azcanta while resolving its triggered ability even if you choose not to put the top card of your library into your graveyard.
3. For more information on double-faced cards, see the Ixalan mechanics article (http://magic.wizards.com/en/articles/archive/feature/ixalan-mechanics).
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