Deimos is a name used by two unrelated characters in the DC Universe. He is the arch-nemesis to Warlord, a ruthless and malevolent necromancer who leads his own private army. Formerly a high priest of Thera, he used the Scrolls of Blood to usurp control of the throne and attempt to conquer all of Skartaris.
In other media
Appears in Justice League Unlimited (episode "Chaos at the Earth's Core")