Ghost of Resurrections

{4}{t}: Return target planeswalker or legendary creature from your graveyard to the battlefield.
Indestructible
(effects that say "destroy" don't destroy this.)
"In its dying breath, the Traveler created Ghosts...
To seek out those who can wield its Light as a weapon.
Guardians, to protect us and do what the Traveler
itself no longer can." - The Speaker