I first read a DC comics story with this villain back in the 80's. Some things I remember about the character:
- He is portrayed as the bringer of the end of the world
- His name had some connection to Armageddon or apocalypse or something like that
- He was said to have his base "at the end of time"
- In the story I read, he was fighting some time-traveling heroes (the time machine they traveled in looked like a sphere)