Udrah, Soul of Deception

When Udrah, Soul of Deception enters the battlefield, you may pay X life and put X target non-land permanents on top of their owner's library.
{b}{u}{t}: Exile the top 2 cards of target players library. You may cast a creature card exiled with Udrah, Soul of Deception without paying its mana cost, you lose life equal to it's converted mana cost. Destroy all other creatures that entered the battlefield this way.