Here is a copy of The Mighty Thor #197- March 1972
It is in used, see pictures for condition.
The Well At The Edge Of The World!
Kartag defeats Thor, but the Norns intervene and grant Thor his request for water from the Twilight Well. They command Kartag to accompany the Asgardians back to fight Mangog. They arrive just in time, as Mangog is about to kill Odin. Meanwhile, Sif and Hildegarde fight off a monster on Blackworld before meeting Silas Grant, a native who promises to tell them who is responsible for the mysterious changes around them.