Mothman, The Ill Omen

Flying, deathtouch
When Mothman, The Ill Omen enters the battlefield, you may fateseal 1. (Its controller looks
at the top card of an opponents library, then he or she
may put that card on the bottom of that library.)
{u}{u}{b}{b}{t}: Exile the top card of an opponent's library. That player loses life equal to twice the
card's converted mana cost.