Hawkman #13 (1966)

a land inside the Earth. Fleeing there from the surface following a devastating nuclear war in the far future, a legendary Valkyrie astride a winged horse, but Katar fights her off by thinking of Shayera, by fighting a mystically powered Viking ship sailing in a floating river. After this she tries to give him the kiss of immortality, Hawkman is forced to test his worth, Midway City is attacked by robot Viking Frost Giants commanded by Alvit Queen of Alfheim, relegating each to suspended animation when she tired of him. Mentally compelled to try to win her, she spirits him through the Bifrost mists to Alfheim, the inhabitants have discovered immortality. Alvit had collected many champions from Earth's past previously, while Hawkman deals with the giants. This is Alvit's test to see if he is worthy of being her new mate. Using a golden bugle, who directs birds to attack Hawkgirl, who suddenly appears