The Mighty Thor vs. Seth, The Serpent God

Plot

Seth, the Egyptian God of Death, has set his sights on Asgard, and he won't stop until he's exterminated the entire race! It's an all-out war between the gods, with Seth pulling out all the stops and winning! But is it possible? Is Odin still alive? Guest-starring Earth-Force and the Black Knight! And what hope does Thor have against Surtur the Fire-Demon, the one villain Odin has never been able to permanently defeat? COLLECTING: Thor (1966) #395-400