Supergirl, Vol. 1 #7 (1973)

The Sinister Snowman!
Supergirl and Zatanna have separately fallen in love with Tony Martyn, a Peace Corps volunteer who has been lost in the Himalayas. Both women decide to try and track him down. Supergirl learns from the Himalayans that they are ruled by an evil wizard called the Orgox, and that Tony went to his mountain to prove that the Orgox was only a mortal. Zatanna and Supergirl each encounter mystic menaces on their way up the mountain, finally work together, and manage to defeat the Orgox and rescue Tony. In anger, the Orgox brings the mountain crashing down; though the heroines think he has perished, they cannot be sure. Tony thanks both Zatanna and Supergirl, and then reveals he has a fiancee waiting for him in America.
Release Date: 1973