Uro, Titan of Nature's Wrath

Uro, Titan of Nature's Wrath {1}{G}{U}

Legendary Creature - Elder Giant | Power/Toughness: 6 / 6 (CMC 3)
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.)