... It's set in ancient rome where a young man goes to take revenge on the emperor (the emperor having massacred his family). On arrival he findes out that the emperor is immortal because he feeds jewish souls to a little satanic box he swallows between "feedings". It's excepcionally bloody, at one point featuring a murdered human arranged into the patterns of a swastika ("Do you want it?", "It's beautiful!". OR words to that effect).
I could go on but I suspect that should do it.