The City of Atlantis

The City of Atlantis enters the battlefield tapped. When Atlantis enters the battlefield, look at the top 3 cards of your library, then put them back in any order.
{t}: Add {u}
"10,0 0 0 years before the Egyptians built the pyramids, Atlantis had electricity, advanced medicine, even the power of flight." - Milo Thatch (Atlantis: The Lost Empire - 20 0 1)