Return of the last survivor

Merlin, the strongest human elementalists remaining, is fighting the otherworldly zombie monarch; Zero, along with the rest of the handful survivors of the human race. However, Zero suddenly grins and unleashes a truly terrifying attack wiping out everything.

However, when Merlin opens his eyes, he is alive, and back to the time just before it all started. Before Zero, before the zombies, before the apocalypse.
Now he must move forward in order to protect those he couldn’t before, and change the fate that awaits Earth.