A master schemer, he is the puppet-master behind most of the machinations facing Al Simmons, and is seeking the Throne of Creation so that he might remake the universe to his own whim.

It has been revealed that he was one of The Forgotten, a group of muses that stayed loyal to God but refused to fight against their fellow archangels in the War in Heaven.

For this he and his kind were banished from Heaven, but unlike the rest of The Forgotten, Mammon was not bound to The Tiend and instead appears to have been cast into Hell.

Additionally, he orchestrates the plot to give Cog the means and opportunity to betray Spawn and seize control of the 8th Sphere of Hell.

He reveals the truth about Eddie's father to him to destroy his faith, weaken his powers and halt his attack while his minions capture Spawn.

He sends Violator to Earth to take over Jason Wynn's body in order to break Spawn physically and mentally.

In the end, he gets her powers and uses them to destroy Spawn's memories of Wanda and then send him on his way to break the Tiend and release The Forgotten so that they might begin the assault on Heaven.

However, Mammon saves himself from Thamuz by offering Satan a way to increase the ranks of Hell's army - namely, triggering the San Andreas Fault.

It is revealed that upon his fall from Heaven into Hell after the failed uprising against God, he offered his services to Malebolgia, completely unaware, that Mammon became the seemingly omnipotent ruler of the 9th Sphere.

He then traveled the earth for centuries learning alchemy, divination, and sorcery, eventually coming to the conclusion that the human race could be the greatest of all creation.

Instead, he chooses Morana, Wanda Blake and Al Simmons' child, whom Mammon took from her parents at the hospital after her mother miscarried.

Eventually even his work for Malebolgia is revealed as another ruse: by selecting and recruiting Hellspawns on his own, he seeks to create a perfect bloodline, reuniting under one final offspring the lines of his best subjects.