Phantasm's Hourglass

Hideaway (When this artifact enters the battlefield,
look at the top four cards of your library, exile one face
down, and put the rest on the bottom of your library.)
{1}, {t}: Look at the top card of your library. You
may put it into your graveyard.
{u}{b}, {t}, Sacrifice Phantasm's Hourglass: Turn
the exiled card face up, then return a creature
card with the same converted mana cost as that
card from your graveyard to your hand.