Uro, Titan of Nature's Wrath

When Uro enters the battlefield, sacrifice it
unless it escaped.
Whenever Uro enters the battlefield or attacks,
you gain 3 life and draw a card, then you
may put a land card from your hand onto the
battlefield.
Escape—{g}{g}{u}{u}, Exile five other cards from
your graveyard. (You may cast this card from your
graveyard for its escape cost.) Proxy