Stargate SG-1 (Titan)
I, Ba'al is a short story, which was published by Titan Magazines in Stargate SG-1/Atlantis/SG:U: The Official Magazine 31.
Ba'al was prepared to bide his time, awaiting the fall of other System Lords before embarking upon his own schemes of domination. Then he met an immovable object named O'Neill...
An official extract: