THOR (1962) #377

While Thor is working on a mysterios project in Midgard, the Dark Elves summon Grendell to kill their foe; Loki captures Iceman and uses him to bring winter to Asgard and empower the Storm Giants. Appearances by Heimdall, the Enchantress, Loki, Iceman and the Beast (from X-Factor), Sif, Fandral, and Hogun.