This time he takes the Mexican horror film LA MARCA DEL MUERTO and adds voice-over narration, new scenes with American actors and hacks up the original film. The "original" movie was about a mad scientist who discovers eternal life so he kills young women for their blood. The scientist is eventually killed for his crimes but centuries later a relative, also a scientist, digs up his body, gives it a blood transfusion and the old mad scientist is back alive and committing more crimes.
Obviously it's impossible to fully judge the original film since it's dubbed here, edited down and of course there's the new footage. With that said, watching the footage here certainly makes me want to seek out that film because there was some nice moments in it including a rather good looking monster, some nice atmosphere scattered throughout and it has a fairly interesting story. The sets are all rather cheap and silly looking but at the same time that adds a little charm.
Director Warren made some movies on his own like TEENAGE ZOMBIES and FRANKENSTEIN ISLAND. Whenever Warren made movies on his own they were usually downright awful with very little actually going for them. He often bought the rights to foreign movies and did hack jobs like this one here. His most popular was probably HALF HUMAN with John Carradine. So, how is this film? For the most part it's entertaining thanks in large part to the original footage. The narration added here is all rather silly and there's no question that the newly added footage is horrible. As with his other hack jobs, the new footage is just a group of American actors sitting around and talking about stuff.
Review by Michael_Elliott from the Internet Movie Database.