The last reality bender

Three thousand years ago the world shattered.

The one who was tasked with preventing the end had failed. Forgotten and fated to never wake up again, he slept in his stone tomb for three millennia.

When he opened his eyes again, he had woken up to an age of magic, and of forgotten relics of the past. Of his past.

How could a man of science, of technology capable of bending reality itself, approach a world so vastly different than his own?