Character/DC

The Master of Doom

Ultimo, from Knights of the Galaxy

The Master of Doom first appeared in Mystery in Space #6 (1952-02), published by DC. 3 appearances are indexed across 3 series.

Also known as Ultimo

When he first encountered the Galaxy Knights, Ultimo forced them to play his Game of Doom. When next he appeared, he transported the Knights back to the 20th century, then set out to conquer the galaxy in the 30th century.