Thor (1962 Marvel 1st Series) #346

Ragnarok and Roll: Prologue 2 of 4 - Cover by Walt Simonson. Thor battles Malekith and his evil hounds in "The Wild Hunt!", script and pencils by Walt Simonson, inks by Terry Austin; The Dark Elves try to capture the Casket of Ancient Winters from its new guardian, Roger Willis; Thor helps out; Malekith captures Thor's true (or at least enchanting) lover, Melodi, and threatens to kill her if the Casket is not given up.