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I've never been terribly familiar with the Faceless Hunter from Saturn. He turned up in a DC Comics Presents story in the '80s as part of The Forgotten Villains, who got an entry in Who's Who. He'd previously had a string of misadventures in early '60s Strange Adventures, and has been unearthed a time or two in more recent years. Most likely, he's best known for his role on the cartoon Batman: The Brave and the Bold, where he acted as a herald to Starro the Conqueror in a riff on old Galactus comics. For a Silver Agey animated series, Faceless Hunter was a brutal cat who figured into a surprisingly dark story involving the death of a hero.
Anyway, he seems like a pretty cool dude, and the character was brought into the Son of Saturn canon in a roundabout way during a Superman mini-series. Apparently, the Faceless Hunter is actually from Klaramar, a world revolving within an atom upon the planet Saturn, and Jemm somehow finagled jurisdiction over the whole thing.
Check out the original black and white art here.