When Cloudthresher enters the battlefield, it deals 2 damage to each creature with flying and each player.
Evoke(You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
4/15/2013 If you cast this card for its evoke cost, you may put the sacrifice trigger and the regular enters-the-battlefield trigger on the stack in either order. The one put on the stack last will resolve first.