Amazo the Android:
Amazo was built by the insane super-scientist Professor Ivo to battle the Justice League. Ivo wished to demonstrate his ingenuity while ridding the world of its premier superhero team. It was originally said that Amazo was created using "Apellaxian" technology.
Amazo was originally built to imitate the powers of the original JL members: Superman, Batman, Wonder Woman, Green Lantern, The Flash, the Martian Manhunter, and Aquaman.
Amazo the Android is basicly functioning in a way that he copies the powers of the foe permanently. The Android after defeating the Justice League went out into the universe to discover the meaning of life. The meaning of existance. A couple of years later, Android returned to Earth to speak to Lex Luthor, who was claimed to have everything and yet craving more. Android wished to know why, and as he returned after his time out in cosmos, he had absorbed the powers of cosmos itself.
At the point where he stole Superman's powers, Batman discovered that he got vournable to kryptonite. Batman used this to put Amazo on the run. Unfortunatly not for long, as Amazo returned hours later, entirely immune to the energy of kryptonite.
He broke trough the entire JLU force without any problems. His powers is not only to gain their strength, but to built up immunity.
At the point where he had returned from cosmos, he had the powers of the universe, time and space. Once he reached Lex Luthor, he forged a dimension of his own where he spoke in privacy together with Lex Luthor and Dr. Atom who did his best to aid Lex and protect him. [To no use obviously]
When Lex Luthor refused to cooperate, Android was inches away from destroying the universe because there was no point of its existance. That got Lex on second thoughts and Lex explained why he kept going.
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