Through artificial means a man replicates his face to cover his gruesomely deformed real face.
He replicates his own face only once.
When he is ready the hunters become the hunted.
He doesn’t always directly pursue his quarry, sometimes he lures them into waiting deathtraps.
He seeks to retain the love of his life.
A scorpion of unusual size and make up is involved.
Ok, here’s the clincher: He eats from one side of his head and talks from the other side of his neck!
His main adversary seeks the same thing that the Protagonist is ultimately after, but in the end only one of them will have the key!
The sands of Egypt, the River of Life.