Legion of Super-Heroes, Vol. 2 #298C

The Edge of Nowhere / Duel in Dark Magic!
Kharlak the Khund returns to challenge a Legion team who are investigating a murder on a mining asteroid. Duplicate Boy flies to Earth to confront his girlfriend Shrinking Violet about her new relationship with Colossal Boy but leaves after punching out his rival. Dark Opal has plans to conquer the Gemworld, but he knows Amethyst will be a great obstacle.
Release Date: 1983