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 a 4/4 black Zombie Human Shaman
with no mana cost. Eternalize only as a sorcery.)