Bonebark Whistle

{2}, {t}, Sacrifice Bonebark Whistle: Reveal the top four cards of your library. Put all cards revealed this way that share a creature type with a card in your graveyard into your hand, then put the rest into your graveyard.
_________________________________________
"Though most think the whistles to be ornamental, Lystherian legends tell that in times of dire need, one's ancestors will answer the call."