Kalan, Titan of Forest's Might

When Kalan enters the battlefield, sacrifice it unless it escaped.
Whenever Kalan enters the battlefield or attacks, reveal the top three cards of your library. You may put a creature or land card from among them into your hand and the rest into your graveyard.
Escape - {g}{g}{g}{g}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)