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3rd app of JLA; 1st app Amazo (the Android); 1st app of Professor Ivo (creator of Amazo); COMIC BOOK IMPACT rating of 7 (CBI)
In just their third adventure since their inception, the Justice League encounters a superpowered robot named Amazo, who can mimic all the abilities of the hero team, matching them in battle and eventually capturing them for experimentation. It turns out that Amazo is the pawn of one Professor Ivo, who has been harvesting life from animals known for their longevity in an attempt to create an immortality elixir. Green Lantern saves the day by reversing his color polarity to thwart Amazo and freeing his crew to defeat their enemies. Ivo ends up in prison for 500 years, and Amazo gets turned into a trophy back at the JLA’s home base. The story is summed up pretty succinctly on the awesome Murphy Anderson cover.