Thor (1966 series) #139

Sif teleports them to the troll kingdom, where the enchantment won’t affect Thor, right before he transforms into Don Blake.

Asgard faces a troll attack, with Orikal’s weapon draining Odin’s scepter.

Thor gets his hammer back in the troll kingdom, but Orikal has copied it for Ulik. Thor prevails in the hammer battle.

Thor breaks into Orikal’s prison and frees him in exchange for his departure. Orikal confirms that troll weapons will be useless without him. Thor demands Geirrodur’s surrender, forcing the trolls to flee Asgard.

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Story #2

The Secret of the Mystic Mountain! (Tales of Asgard series)

Writer: Stan Lee.
Penciler: Jack Kirby.
Inker: Vince Colletta.
Letterer: Art Simek.

Synopsis

The merciless dictator Mogul of the Mystic Mountain learns that intruders have trespassed into his forbidden realm; he summons the Enchanted Crystal and discovers that his visitors are Thor and the Warriors Three, whom he encountered earlier (issue #137). He summons his Jinni Devil and dispatches it to destroy his foes. Meanwhile the heroes are searching for the Mystic Mountain as directed by Wazir the Prophet but are puzzled to find only a flat, barren plain. Thor thinks he has divined the secret and brings his hammer Mjolnir down on the ground, scattering the crust. Below is revealed a plain of gleaming crystal—and the city of Zanadu lies within a stalactite extending downward as an inverted mountain. An opening appears but before they can descend into the city, a giant figure rises from the depths—the deadly Jinni Devil….