Search for Azcanta

At the beginning of your upkeep, look at the top card of your library. You may put it into your graveyard. Then if you have seven or more cards in your graveyard, you may transform Search for Azcanta. // Azcanta, the Sunken Ruin (Transforms from Search for Azcanta.) T: Add U to your mana pool. 2U, T: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

The Sunken Ruin houses all the learning of a long-forgotten age.