Justice League of America (1960-) #215

Goltha unleashes a still-maddened and gigantic Atom against the city, while Krystal Kaa relates to the JLA heroes how Goltha had usurped her world’s throne years earlier by controlling the Atom’s mind and using him as a pawn and weapon. (The Atom had first appeared on L’arra Sha almost a century earlier than his JLA comrades, despite their having journeyed to the micro-world only hours apart.) The Justice League and the Siren Sisterhood plan to steal into the city through the sewers and recover Krystal Kaa’s power-staff, but are stopped when they encounter Kass’andre, wielding the staff against them.