DC Universe: After the Fall
"Come, Harvey. Step forward and accept oblivion."
A recent arrival in Gotham City, the criminal mastermind known only as Abaddon has already made a name for himself for his ruthlessness and penchant for violence. Next to nothing is known about the origins or identity of this new face in Gotham City’s underworld. All that anyone seems to know is what he has done since his arrival, and the influence that he has been able to build over the course of only a few months.
Shortly after the death of Dick Greyson at the hands of the Red Hood, Abaddon arrived in Gotham with an explosive assault on Gotham City bank. Displaying a wide array of highly advanced technology and weaponry, Abaddon single-handedly overwhelmed the bank’s security team. After about a week, he and his gang began to move in on Two-Face’s turf in the north-east quarter of the city, which culminated in Abaddon murdering Two-Face personally and taking over his entire gang, securing an entire quarter of the city in one swift stroke.
Since then, he has consolidated his control of his part of the city, gaining a potent ally in Mister Freeze. While he has not made any further attempts to expand his area of control in the city, he has met incursions from Joker and Scarecrow with the same brutal efficiency he displayed in his takeover of Two-Face’s gang.