This is a copy of Thor #382 published by Marvel 1987. Script and cover by Walt Simonson (last issue), art by Sal Buscema.
 
Giant-size 300th anniversary issue (Thor began in Journey Into Mystery 83). "Journey Into Mystery," Wearing the Destroyer armor, Thor storms the gates of Hel to get his body back with the curse lifted from it; Hela complies lest her realm be destroyed; Balder and company fight a losing battle in Asgard against the Storm Giants until Thor returns to save the day; Thor has a brotherly chat with Loki.