Age of Hyboria

Wrath-Amon. The Primary Antagonist of the Animated Series on account of being the Primary Focus of Conan's Quest for Vengeance.

His Origin was a fairly odd one, beginning his life as an Ordinary Gila Monster who was kept as a Sniffer by the Army of Set. Later, his immediate predecessor, Ram-Amon ran out of patience with Dregs (a Naga) whose perpetual incompetence and failure led him to use the Black Ring to reform Wrath-Amon from a lizard to a humanoid lizardman to serve as a far more capable Right-Hand 'Man', sparing no attribute in his creation. It worked. Too well. Less than an hour later and Wrath-Amon had deposed him, claiming the Black Ring as his own, becoming the Chief Servant and Cleric of Set, gaining his name and a new almost-human form with it.

So where might you begin his story?

At the Beginning - Perhaps something else occurred to him after his creation? And even if not then, he was busy during the 200+ years before the Series itself actually began.

Sometime in the Series - Something may have happened that altered his course, or perhaps something that wasn't looked at.

Series End - While he was reverted back into a humble lizard at the end, it might have only been temporary. Or it could be that he was either able to escape, or turn things around in his favour and win.