Sansa Stark

When Sansa Stark enters the battlefield, you
may seach your library for a snow land card,
reveal it, and put it into your hand, then shuffle
your library.
Winter is coming — As long as you control eight
or more snow lands, you and other creatures you control have hexproof. Your opponents can't
cast spells during your turn.
"I'm a slow learner, it's true. But I learn."