Elridus, Frozen Warden

{1}{s}: Reveal cards from the top of your library
until you reveal a snow card. Then you may pay
4 life. If you do, You may play it without paying
it's mana cost. Otherwise, put it into your hand.
Put any number of the revealed cards into your
hand. Pay {s} for each. Then put the rest of the
revealed cards on the bottom of your library in
a random order.