Timeless Witness

When Timeless Witness enters the battlefield,
return target card from your graveyard to your
hand.
Eternalize {5}{g}{g} ({5}{g}{g}, Exile this card from
your graveyard: Create a token that's a copy of it,
except it's 4/4 black creature with no mana cost and
it's a Zombie in addition to its other types. Eternalize
only as a sorcery.)
Sometimes, the forest never lets go.