Wikipedia
Ma'alefa'ak
Ma'alefa'ak (sometimes known as Malefic) is a fictional comic book supervillain appearing in books published by the American publisher DC Comics, usually depicted as the archenemy of his twin brother, the superhero Martian Manhunter. Created by writer John Ostrander and artist Tom Mandrake, the character first appeared in Martian Manhunter (vol. 2) #0 (October 1998).
The character appears in the 2010 animated film Justice League: Doom, in which he is voiced by Carl Lumbly.