Hauntwoods Shrieker (M 182 DSK)

Whenever Hauntwoods Shrieker attacks, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)
{1}{G}: Reveal target face-down permanent. If it's a creature card, you may turn it face up.

mythic
Creature — Beast Mutant
From the Magic: The Gathering set Duskmourn: House of Horror.