For reasons known only to DC, the cover of Adventure 371 (Aug 68) represents the back-up feature, a reprint of “The Valhalla of Super-Companions,” which originally appeared in Superboy 101. The story is not a Legion tale at all, and they are added to two panels in a feeble attempt to make it one.
Aside from noting that Ultra Boy, Sun Boy, Duo Damsel and Light Lass make their cameos, I will skip over this tale, and write more about it when I get around to the Superboy series in this blog.
Ultra Boy becomes the new leader of the Legion in this Jim Shooter/ Curt Swan story, but Colossal Boy is the star, as his parents, making their debut, get turned into living glass statues by henchmen of Tarik the Mute. They threaten to kill them unless Colossal Boy gets them information on the Legion training program.
To do so, Gim Allon intentionally messes up on a mission, and Ultra Boy sends him to the Legion Academy for re-training.
Bouncing Boy is serving as a temporary instructor at the Academy, beginning his long association with it. Colossal Boy meets Condo Arlik there, a trainee soon to become Chemical King, another Legionnaire introduced as dead in the Adult Legion story.
Bouncing Boy is suspicious of Gim`s situation, and hoping to get some insight and help him, he breaks into his parents apartment, where he finds Legino training manuals. Apparently taking these home is really awful, much worse than breaking in to someone else`s apartment, because Chuck gets no punishment when he reports this, but Colossal Boy gets expelled from the Legion.
The story concludes next issue.