|Oh, you're the one.|
Adventure Comics vol.1 No.351 (December 1966)
“I’m the Weirdo Legionnaire!”
When Brainiac 5’s government-sponsored efforts to create the most advanced computer intelligence in the universe backfire, the Legion finds themselves under assault by a seemingly indestructible, unstoppable, unquenchable machine of pure hate – Computo!
The two issues featuring the Legion’s battle against Computo are possibly their most fast-paced and gimmick-packed stories as they throw everything but Kitchen Sink Lad at the would-be mechanical monarch; Triplicate Girl is (apparently) killed and cheerily resurrected at two-thirds capacity, the deep-space heroes’ graveyard of Shangalla is debuted, meanwhile Brainiac 5 and the Legion try to overcome Computo by pitting him against an ill-fated (and frankly ill-conceived) Bizarro duplicate, send Chameleon Boy’s shapechanging pet blob into battle as the bizarre Weirdo Legionnaire, and stage a full retreat to the long-abandoned Batcave.
In the end, an anti-matter monster capable of destroying the world is unleashed and barely restrained in the literal last-ditch effort to destroy the robot overlords. Then, wisely, they let Brainiac 5 go invent a bunch of other things.