Daredevil Vol.1 #23
The Marauder transports DD and Gladiator back to his base in hopes of using Hornhead to help power his Tri-Man; When this plan fails, he transports them both to a movie set of the Roman Coliseum in Europe where all the Maggia heads are meeting; DD and Gladiator fight it out in the arena until a caged lion gets loose and DD ends up saving his foe's life; Gladiator refuses to fight after this and gets a job with the Maggia.
First Printing: Dec 1966
Writers: Stan Lee
Art: Gene Colan and Frank Giacoia
Cover: Gene Colan and Frank Giacoia