Cavalier of Tides

{t}, Untap target permanent.
When Cavalier of Tides enters the battlefield
look at the top 3 cards of your library. You may
reveal a creature or land card from among them
and put it into your hand. Put the rest at the
bottom of your library in a random order.
When Cavalier of Tides dies you may put a
creature card from your hand onto the
battlefield.