From Adventure Comics #354-355. These issues were later reprinted in a DC Super-Stars Giant, which is where I read the tales of the adult Legion of Super-Heroes. I think I lost and re-bought that issue on at least four different occasions.
This two-part storyline of the adult LSH wasn't really much different from the regular teenage LSH, but even the most casual Legion fan remembers the prophetic details of what would happen to many of the characters. But the greatest moment wasn't in finding out who died, who married whom, the sneak preview of characters yet to come, or who would lose their powers. Oh, no. The jewel in the crown was thus:
Yup. Super-sensitive nostrils. "Nostril" is a word we don't use enough these days, and I'm going to change that, single-handedly if need be. Nostril.
But when we finally tear ourselves away from the drama that is the Nostrils of Tomorrow, check out the opening page of part II:
Whoever these mystery characters are, we can only hope it's someone with better aim. Seriously, these two warring factions are what.... three feet from each other? Lightning is flying everywhere, and no one takes a hit. It's like the big battle scene in any episode of The A-Team.
I love how Saturn Woman and Saturn Queen are fighting each other with bitch looks. I guess when you're a telepath, all you can physically do to your opponent is give her a dirty look.
Oh, no you di'it!
Oh, yes, I did!
and so on, and so on, until one of them takes off their earrings and the weave-pulling begins.
From Secret Society of Super-Villains #6:
I hate to be one of those fanboys, but when did Captain Cold's pistol become a Green Lantern ring? It shoots out ice. That's about it. So, an iceberg is fine. We can also accept something along the lines of an ice bridge or maybe an ice slide. Sure.
But life-sized, detailed ice sculptures of football players? Not so much. I just don't see the good Captain having the kind of time required to crank out something like that. And, even if given all the time in the world, I don't think Deadshot would have the weaponry skill involved to give the statues that kind of intricate detail, and he's got much better aim than Captain Cold.
One thing is for certain, though:
Fear the mighty "TWEEE!" of Black Canary.
Nostril! Tweee! Nostril!