Bring on the Bad Guys: Professor Ivo and Amazo

Real name: Ivo

First appearance: Brave and the Bold I#30 (June/July 1960)

Abilities: Making robots, being immortal 

Worst act: Attempted murder, stealing super powers 

Quote: "Before the chlorine gas in the cylinder overcomes you, Flash--I want you to know I am Professor Ivo, creator of the amazing android, Amazo!"

"I move clumsily--sluggishly! I'm not fast anymore! Master...what's happening?"

Created by: Gardner F. Fox (script), Mike Sekowsky (pencils), Bernard Sachs (inks)

Considered making these guys two separate profiles, but eh. Last time the League would be in Brave and the Bold, with their next appearance would be in their own series. 

Ivo seems to have 2 motives. First, he builds Amazo for the purpose of stealing super powers; second, he wants to be immortal. 

For the first part he succeeds and manages to capture most of the League with little to no issue. Funny enough he ignores Superman, but this isn't present as arrogance or foolishness on his part. With the other powers at his disposal plus easy access to kryptonite, what would he do with Superman?

As for the latter he also succeeds but it is clearly more of a curse. The JLA escapes and get their powers back, so now he's sentenced to 500 years. Didn't think that one through, did you?

Ivo isn't the JLA main eventer but he's still managed to pop up a decent amount. Amazo has had a longer career. Sort of predates the Super Adaptoid too, what with his many hero powers bit.