Echoing Whispers

When Echoing Whispers enters the battlefield and at
the beginning of your upkeep, choose target nonland
card in an opponent's graveyard or a nonland permanent
under an opponent's control. Look at the top card of
your library. You may reveal it. If you do and the revealed card is the same name as the chosen card, exile it, and you may play it without paying its mana cost for
as long as it remains exiled. Otherwise, you may put
the card on the bottom of your library.