The second appearance of Man-Thing and the first that is clearly in continuity. The character debuted in a generic, black and white monster story in Savage Tales #1.
His first adventure features Ka-Zar and A.I.M. First, he and Ka-Zar meet…
Then AIM captures the Man-Thing, and Ka-Zar goes on a search-and-rescue with Bobbi Morse (future Mockingbird).
Big explosive happy ending, AIM’s base is blown up, and Man-Thing can return to living in peace.
Len Wein and Neal Adams do a little flashback in the middle of the story as well, in back and white and yellow.