Lantern of Despair

Morph {w}{b} (You may cast this card face down as
a 2/2 creature for {3}. Turn it face up any time for its
morph cost.)
When Lantern of Despair enters the battlefield
or is turned face up, exile target permanent or
spell.
When Lantern of Despair leaves the battlefield,
return the exiled card to its owner's hand.
They lose life equal to that card's mana value.