Thor #226 (1974)

 Firelord has summoned Galactus, the Devourer of Worlds. When Galactus arrives on Earth, he tells Thor how he was defeated by the mad Ego, the living planet! Galactus asks Thor to fight Ego with him; they barely manage to breach the atmosphere of Ego and reach the surface. Cameos by the Silver Surfer, the Watcher, and the Fantastic Four. Written by Gerry Conway, pencils by John Buscema, inks by Mike Esposito and Dave Hunt; cover pencils by John Romita.

Key book; second appearance of Firelord. Note: The Marvel Value Stamp series A #58 (The Mandarin) was removed. Fair condition.