Sandvad, Mage Apprentice

{t}: Cache a card from your hand. If your cache has 8 or more cards in it, you may sacrifice Sandvad, Mage Apprentice, search your library, cache and hand for a Sandvad planeswalker into play. If you do, shuffle your library. (To cache a card, exile it face down. You may look at it at any time. You may draw from your cache instead of your library.)