Marvel Spectacular #1 (1973)
Reprints Thor (1962-1996 1st Series) #128. "The Power of Pluto!" Part 1 of 3. Guest-starring Hercules. Story by Stan Lee. Art by Jack Kirby and Vince Colletta.
Pluto, the malevolent ruler of the Underworld, has deceived Hercules into taking his place as master of the stygian depths. Can the Prince of Power find a way to break an Olympian Contract before it is too late? Maybe with a little help from the God of Thunder.
Plus, the back-up feature Tales of Asgard - "The Challenge!" By Stan Lee and Jack Kirby. Originally presented in Thor #116.