Avengers Vol.1 #186
The situation in Transia has taken a turn for the worse! While Bova tells Pietro about his childhood, Wanda wages a life-and-death struggle against Modred the Mystic atop Wundagore Mountain! Unfortunately, the battle goes poorly and an elder demon from centuries ago possesses the Scarlet Witch! Recognizing the imminent danger, Quicksilver makes a mad dash to the only telephone in the village...and places a desperate call to Avengers Mansion! Can the lightning-fast avenger contain his sister's destructive rampage while the other avengers travel to Transia? Hope is fading by the minute!
Printed: Aug 1979
Writers: Mark Gruenwald, Steven Grant, and David Michelinie
Art: John Byrne and Dan Green
Cover: John Byrne and Terry Austin