Ka-Zar The Savage #6 (1981 Series)

Shanna is having delusions due to the effects of the mind-switching device; Ka-Zar has been stung and poisoned by a giant scorpion, and Shanna starts seeing a ghostly figure; The apparition reveals that he is an ancient Atlantean, and that Pangea is actually an outpost of Atlantis; The ghostly figure reveals himself to be a scientist named Dherk, he predicted the city's eventual sinking, and due to this he is banished to Pangea; Dherk body was placed in suspended animation but is able to appear as a projection, but he can temporarily make himself tangible; Dherk first saw Shanna while she was in the mind transfer device and from their he has fallen in love with her.