Avengers #170
"... Though Hell Should Bar the Way!"
April 1978, in collection
Pietro vanishes from Attilan; Ultron's bride re-awakens and attempts to find him
reprinted in
*
40 Years of Avengers
2006, in collection
(2006*)
*
Avengers: Ultron Unleashed PF
August 1999, in collection
(8/1999*)
*
Marvel Digital Comics
no date
(no date)