Shelldock Isle (Secret Lair Drop 437) - Rare Magic: The Gathering Card

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
: Add .
, : You may play the exiled card without paying its mana cost if a library has twenty or fewer cards in it.