Sabbac is the name of four American comic book supervillains appearing in DC Comics. The original Sabbac debuted in Captain Marvel Jr. #4 (February 1943), and was created by Otto Binder and Al Carreno as an enemy of Captain Marvel Jr., while an updated version debuted in Outsiders #8 (March 2004), and was created by Judd Winick and Tom Raney as a nemesis for both Junior and the Outsiders superhero team. Another version, created by Bagdon cultists, debuted in Superman/Shazam: First Thunder #2 (December 2005) by Judd Winick and Joshua Middleton. A fourth version was introduced in Justice League #10 (August 2012), and was created by Geoff Johns and Gary Frank as an adversary for the Shazam Family and an associate of Black Adam and the Seven Deadly Enemies of Man.

Ishmael Gregor appeared in the television series Arrow, portrayed by David Meunier, and the DC Extended Universe film Black Adam, portrayed by Marwan Kenzari.

The original Sabbac is depicted as a "dark opposite" to the Marvels, similar to Captain Marvel's foe Ibac, who draws his powers from four historical villains. The dark forces of Hell gave the human Timothy Karnes the power to become a being with powers to rival Captain Marvel. To access this power, all Karnes has to do is say the magic word Sabbac, and magic black lightning strikes up from the underworld and transforms him into a muscle-bound demon with super-strength, super-speed, flight, fire breath, and the ability to emit fire blasts from the palms of his hands. His powers match those of the Marvels. Like Captain Marvel's magic word Shazam, the word Sabbac is an acronym for the six beings who empower Sabbac: the demons Satan, Aym, Belial, Beelzebub, Asmodeus and Crateis. He resembles Timothy in green robes but with a more muscular build and fangs in his pronounced overbite. Sabbac was an enemy of Captain Marvel Jr. Sabbac appeared in two issues of the Golden Age Captain Marvel Jr. comic book (issues #4 and #6, both from 1943), and in two issues each of World's Finest Comics and Adventure Comics during the early 1980s. When he first appears he joins Nazi agents, being promised power over America if he helps them conquer it, and tries to destroy transport lines to isolate eastern and western North America. However, as he continues to battle Jr., the various demons empowering him leave him as things grow increasingly bleak for the villain, removing his powers until Satan leaves him, allowing him to be defeated.

In 2004, Sabbac was introduced into DC Comics continuity in Outsiders #8, written by Judd Winick and illustrated by Tom Raney. The story established Timothy Karnes as Freddy Freeman's (Captain Marvel Jr.'s alter-ego) former foster brother. Freddy's parents, David and Rebecca Freeman, had taken Timothy in, but the boy was sent to live with another family when the couple were killed in a car accident. Timothy would find himself shuffled from one abusive foster home to another, and grew to hate and resent Freddy Freeman, who lived a successful and relatively peaceful life with his grandfather.

In Outsiders #8–10, Captain Marvel Jr. and the Outsiders team face a new, more feral version of Sabbac. This version of Sabbac, possessing amplified demonic powers and a hairy beast-like appearance with horns instead of the more humanoid original form, is the alter ego of Ishmael Gregor, a Russian immigrant who had become a New York City mob boss. Gregor lusted after the power of Sabbac and had his men find Timothy Karnes, who had been incarcerated and had his voice box removed to prevent him from speaking. Gregor initiates a demonic ritual which he states will allow Karnes to access his power without needing to speak. The ritual involves the murder of an entire New York bus full of passengers. At the end, Gregor kills Karnes and gains the power of Sabbac for himself.

The second Sabbac opens a portal in the backyard of a very specific California home. This brings a host of demons into the world. He is challenged by the Outsiders and Captain Marvel Jr. and flees when his demons are defeated.

The Secret Society of Super-Villains sends Deathstroke the Terminator to Las Vegas, where Sabbac is taking over the local Mafia. Deathstroke kills Sabbac's personal entourage and convinces him that the Society has much to offer.

Sabbac also works with the Fearsome Five to attack Alcatraz in San Francisco, now a supervillain prison. They are there for the seemingly minor purpose of freeing the FF member Mammoth. During the attack, the magical Rock of Eternity explodes over Gotham City. Sabbac's preparations allow him to absorb the sentient power of the Seven Deadly Enemies of Man. He also grows much larger. He uses 'Lust' to bring down the Five, the Alcatraz prisoners, and a majority of the guards. He uses the other sins in combat against the Outsiders. Donna Troy appears and the heroes use Katana's magic Soultaker sword to imprison the demon. From inside the Soultaker, Sabbac admits that the Society had enlisted him to kidnap Captain Marvel Jr. and bring him to Lex Luthor.