The Avengers #187

In "The Call of the Mountain Thing!", the Avengers find themselves crash-landed in the mysterious nation of Transia, where they’re ambushed by Modred, the dark sorcerer of Wundagore, and the magically possessed Scarlet Witch. With the fate of their team hanging in the balance, the heroes must rely on their strength and unity to break free from her spell. Written by Mark Gruenwald, Steven Grant, and David Michelinie, with dynamic art by John Byrne and cover by Byrne and Terry Austin, this 1979 issue delivers a thrilling clash of magic and might.