Thor #210 (1973)

"The Hammer and the Hellfire!"  Cover pencils by Gil Kane, inks by Joe Sinnott, script by Gerry Conway, art by John Buscema & Don Perlin, inks by Vince Colletta.  In the caves of Geirrodur, he and Ulik look on with anger at Thor, who has found a deserted cliff and fallen asleep. While sleeping, Trolls try to bring Thor back to their caverns, but before they get very far, he awakens, just as Ulik strikes! During the battle, other Trolls bring up a large chunk of magnetized Uru ore, which pulls Mjolnir free from Thor, and holds it tight while the Trolls carry it off.  The Trolls hurl it all into a flaming foundry.  Thor, knowing he will soon revert to his mortal form lunges into the foundry after it.

Good condition.