All Devouring Narwhal

When All Devouring Narwhal enters the battlefield, return target card from your
graveyard to your hand.
Eternalize {3}{u}{g} (Exile this card from
your graveyard: Create a token that’s a copy of it,
except it's a 4/4 Abyssal creature token with no mana
cost. Eternalize only as a sorcery)
"A mysterious and gargantuan creature from another
world. "