Zamazenta, the All-Dogger

Zamazenta, the All-Dogger has indestructible as long as there are four or more historic cards in your graveyard. (Artifacts, legendaries, and Sagas are historic.)

Dauntless Shield — Whenever Zamazenta or another legendary creature you control dies, return target legendary creature card with lesser mana value from your graveyard to the battlefield tapped.