Octopus's Garden

Hideaway 5 (When this land enters, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.)
{t}: Add {u} or {g}
{1}{u}, {t}: Exile up to four creatures you control. If more than three creatures are exiled this way, you may play the hidden card without paying its mana cost. If you do, return the creatures exiled with Octopus's Garden to the battlefield at the end of your turn. Then exile Octopus's Garden at your next upkeep and return it