Thor #251 (1976)

' Thor wonders if the All-Father is dead. He journeys to Valhalla, an aged warrior. Upset and depressed, attack. During the battle, outraged that anyone living would enter Valhalla, Thor broods over Odin's disappearance. When the Vizier fails to find Odin 'upon all the many spheres and planets, Thor climbs the mountain only to discover that the figure is Grombar, Thor encounters Harokin and the Einherjar who, Thor fights his way toward the shadowy figure but Hela intervenes and assures him Odin is not there. Unbelieving, Thor spies a shadowy figure on a mountain that he believes is Odin but the Einherjar fell him with the Troll-made Bludgeon Bow before he can investigate. Rising again, Thor wearily heads back to Asgard., where his horse dies. Proceeding on foot