This story takes place at the same time as Daredevil #7 and Fantastic Four #38. First appearance of the land of Skornheim. Nick Caputo suspects that Carl Hubbell provided alterations on the figures of the Executioner, the Enchantress and Daredevil on pages 11-13, per his blog:
First appearance of Princess Rinda and King Hymir.
The "first line" sequence mentions Thor #63, but it is likely meant to refer to Journey Into Mystery #115 when Loki made an alliance with Ghan, the storm giant.
Letters from John Ellsworth, Gordon Fitzgerald, Judy Pope, and Terry Levin; includes The Mighty Marvel Checklist.