This cover was Kirby’s return to Thor after five years, and he definitely came back swinging, if you’ll pardon the pun. I wonder if he’d been watching some old Harryhausen movies prior to drawing this?
Disagreement on sources as to the inker here. Kirby Checklist has Mike Esposito, and the GCD, via frequent commenter Nick, has Frank Giacoia. I’m leaning towards Giacoia. Are there any indisputable Esposito inks on 1970s Kirby to compare?