Born untold thousands or even millions of years ago in the dimension of the vastly powerful energy-entities called the Faltine, Dormammu and his younger twin sister Umar gathered matter to themselves, a practice anathema to their fellow Faltine. After ultimately slaying their parent Sinifer, they were driven from their home dimension by the other Faltine. As the exiled twins explored other dimensions, they continued to gather matter and assimilate it into their beings. They eventually decided that the Dark Dimension, a mystic realm riddled with natural warps into pocket universes within the dimension itself, was best suited to their purposes and used their accumulated matter to create permanent human forms for themselves. When they arrived in the Dark Dimension, its multi-species society had been at peace for almost 28,000 years and was in the 28th cycle of the rule of the wizard-king Olnar the First. Despite the warnings of the other Mhuruuks who served as his advisors, Olnar offered Dormammu and Umar sanctuary and power in exchange for the knowledge of how to shatter dimensional barriers and absorb other dimensions into his domain. In the 29th cycle of Olnar's rule, Dormammu, whether by chance or design, led Olnar to the dimension of the Mindless Ones, indestructible rampaging dreadnoughts who slew Olnar and many other Dark Dimension denizens. Dormammu and Umar repelled and confined the creatures, using the confusion to murder most of the Mhuruuks, and were hailed as heroes by the Dark Dimension, of which they were proclaimed regents; Olnar's infant son Orini, deemed no threat, was allowed to live under their care. As ruler, Dormammu partially reverted to flaming Faltine form and merged his essence with that of the Dark Dimension's innate mystic energies, increasing his power enormously.
Little is known of Dormammu's early rule, and since denizens of the Dark Dimension have millennia-long life spans within a universe whose time passage may not match Earth's anyway, it is almost impossible to guess how long those activities lasted. He warred with several extradimensional rulers and allied with others, forming a pact with Odin of Asgard and even joining the embodiment of Eternity to banish the occult juggernaut called Zom within a netherworldly amphora. Although the clashes or direct alliances of Odin and Dormammu would not be common in the modern-time Marvel Universe, Loki claimed that Odin spoke of Dormammu in comparison to himself, contrary to Dormammu's belief Odin would regard him with "dread." Dormammu's power combined with the force of the Evil Eye was enough to nearly crush the entire Marvel Universe by merging it with the Dark Dimension, showing his potential to threaten entire realities with sufficient might. He apparently observed the Earth dimension for several millennia, supposedly even manipulating the creation of the demon Satannish in Earth's ancient pre-history; he often clashed with Agamotto, the extra dimensional entity who appointed himself that universe's first Sorcerer Supreme and held his own against the former, and his disciple, an unnamed tentacled alien. Dormammu at some point knew of both the Celestials and Zeus, and claims he will "burn" the former while his power equals that of the latter. Dormammu also has acknowledgement and respect for the ancient Atlantean mages, even abandoning the Hood for Jennifer Kale, whom he knew has been trained by Dakimh the Enchanter himself, thousands of years later, while Kale's Tome of Zhered-Na warns all sorcerers to reject Dormammu's temptations, indicating even Zhered-Na and the mages of Atlantis knew of his existence and threat. The immensely powerful amulet called the Eye of Agamotto was wielded against Dormammu, as was the mysterious Staff of One of the Minorus (evokers of the Nisanti demon and thus at least indirectly his own power), but Dormammu rarely if ever met true defeat, and in time he ascended the ranks of those mystic beings whose patronage was beseeched by mortal sorcerers.
When Umar went mad after bearing a daughter to Orini, now in millennia-old adulthood, Dormammu used trickery to banish her to a pocket universe, becoming sole ruler of the Dark Dimension and continuing his conquests. Orini became Dormammu's most devoted disciple and raised his daughter Clea in the Dread One's service.
In 1666 AD, he targeted the Earth once again and caused the "Great Fire of London" and using the life-force of its victims to link to create a portal at Stonehenge. However, he was defeated when forced back to to his home dimension by the Sorcerer Supreme, Yao.
In 1692 AD, Dormammu also clashed with Salem exorcist Hiram Shaw, who vied for the Sorcerer Supreme title, and other earthly foes came and went over the centuries, but Yao, later called the Ancient One, became his true obsession; indeed, the Ancient One's influence spread throughout the multiverse, protecting other realms from Dormammu's grasp. It was through the actions of the Ancient One, aided by the Eye of Agamotto, that he was deemed viable for the role of the Sorcerer Supreme.
In 1943, Dormammu accepted Baron Mordo, disciple of the Ancient One, into his service via the sacrifice of Mordo's own mother and grandfather; a year later, in October of 1944, the Eye of Agamotto was stolen, while Mordo was conveniently (and deliberately) away, by Nazi operatives and brought to the Red Skull, who inadvertently traveled to the Dark Dimension via its power. When Captain America and Bucky (James Barnes) wrestled the amulet from the Skull, the villain bargained with Dormammu for power in exchange for its retrieval, but the Ancient One sent Sgt. Fury and the Howling Commandos to aid Captain America and Bucky, and Dormammu contemptuously dismissed the Skull from his sight; Ironically, Jack the Ripper was one of several time-displaced criminals led against Captain America and Bucky by the sorcerer Terdu later that year. Eventually, Mordo, with Dormammu's patronage, slowly weakened the Ancient One's power, a plan eventually halted in 1963 by Doctor Stephen Strange, who became the Ancient One's true disciple and ultimate successor; however, Mordo continued to provide Dormammu with human sacrifices.
In recent years, Mordo, evidently displeased with his progress as Dormammu's servant, sought sacrifices for a mysterious entity, the Great Enigma. His efforts won the attention of Doctor Strange and the heroic Spider-Man, and Mordo fled through a portal, only to arrive before the Enigma, none other than Dormammu himself, who had perhaps used the alias to test his hapless catspaw. But Strange's opposition intrigued Dormammu, who wondered if the Ancient One's power was at last faltering if only his successor stood against Mordo.
Shortly afterwards, Dormammu sent a ghostly messenger to the Ancient One to announce a renewed intention to conquer the Earth dimension. When Strange traveled to the Dark Dimension in response, Dormammu, surprised that even this challenge did not rouse the Ancient One to action, sent supernatural servitors to bedevil the newcomer. When Strange bested all comers, Dormammu met him in mystic combat, but Strange proved more powerful than anticipated. As he drew upon the Dark Dimension's energies, Dormammu inadvertently weakened the barrier containing the Mindless Ones and withdrew to force them back. Not wishing Dormammu's subjects to suffer, Strange lent his mystic might to Dormammu, successfully re-sealing the juggernauts. Indebted to Strange for his help, Dormammu felt compelled to end the fight, and Strange made him vow never to threaten the Earth dimension again. Enraged by this turn, Dormammu swore vengeance against Strange, a grudge which even outweighed his hatred of the Ancient One.
Dormammu soon found a loophole to his vow by granting Mordo more power than ever before, for Strange's murder by a third party would negate the pact. Mordo and his minions hounded Strange across the world for weeks until finally abducting the Ancient One as a bargaining chip to lure Strange to the Dark Dimension. But Mordo's boasting wearied Dormammu, who brought all three Earth sorcerers with him to a neutral realm where, in his own fit of bravado, he summoned the Lords of the Netherworlds, his peers in dimensional domination, to watch him overcome Strange in hand-to-hand combat. However, when Strange seemed to gain the upper hand, Mordo struck him a mystic blow from behind, outraging Dormammu's sense of honor. Banishing Mordo for his troubles, Dormammu faced Strange in a rematch, but fell to his foe's greater familiarity with physical combat. Before the gathered Lords, Strange forced Dormammu's vow to menace Earth no further even by proxy, cementing the Dread One's humiliation. However, Dormammu struck a parting blow by extradimensionally banishing Clea, and then manipulating fellow Nether-Lord Tazza into attacking the sorcerer.
Driven to mad fury by their grudge, Dormammu, for reasons unclear, dared to challenge the almighty Eternity himself. Even Dormammu's power was no match for the universal embodiment, who dismissed his foe to the mysterious Realm Unknown, the very dimension where, ironically, Clea now languished. Rallying the demonic Dykkors, banished there by the Ancient One long ago, Dormammu sent wraithlike beings to drain power from the searching Strange, whom he imprisoned. Clea, however, escaped to Earth and mystically influenced Umar, ruling the Dark Dimension in her brother's absence, to free Strange. The sorcerer confronted his nemesis at the very gateway to Earth he meant to enter, only for Dormammu to be paralyzed by the force of his own vow to leave Earth untouched.
Months later, having reclaimed the Dark Dimension, Dormammu sought a new loophole by possessing the earthborn Strange himself, but met defeat at the hands of Strange and his new allies, the Defenders. Thinking to make Strange's own friends his catspaws, he then allied with the Asgardian god Loki, Odin's foster son, to manipulate the Defenders into obtaining the talisman called the Evil Eye, whose power he hoped to use to merge the Earth dimension and his own. However, Loki was uninterested in sharing power and manipulated the Avengers into also seeking the Eye, sparking the so-called Avengers/Defenders War.
When the two teams discovered the plot, they confronted both menaces and, at the prodding of the mutant Scarlet Witch, the Evil Eye absorbed Dormammu as energy and redirected it at Loki, driving the god from the scene and insane. During this time, it is revealed that Dormammu also appears to possess knowledge of Uatu (having watched the Sol system for billions of years and thus having existed as long or nearly as long as Dormammu has) and his function even before the two first met, and Uatu appeared to know him as well. Though Uatu's presence in the Dark Dimension, as well as his passing Dormammu's magical defenses, shocked and intimidated even Dormammu, despite his possession of the Evil Eye, he was willing to battle even Uatu if the Watcher intervened. A spark of Dormammu's consciousness remained, and with Umar's help, he was reborn on Earth itself. Having thus cheated his vow, and doubtless buoyed by the Ancient One's recent death in battle with the monstrous demon Shuma-Gorath, Dormammu was nonetheless betrayed by Umar and banished by Strange, now Sorcerer Supreme, and the earth-spirit Gaea. A subsequent gambit, pitting Strange against the demonic Ghost Rider and the ghostly Bounty Hunter, met no better success.
As a new tack, Dormammu allied with Doctor Doom to channel the power of the mysterious mystic confluence called the Bend Sinister, with Doom's pawn Lucius Dilby attempting to use Strange as a human sacrifice. However, Spider-Man disrupted the ritual, freeing Strange but leaving Dormammu no worse off than before. Perhaps reminded of Mordo's defeat years earlier by Strange and Spider-Man, after ritually maintaining universal balance in a chess match with Odin, Dormammu subtly directed Mordo to time-travel to 1943, where Mordo's grandfather Viscount Krowler, his death still months away, absorbed that era's the power of that era's Mordo. Krowler's Dark Cabal then prepared to grant Dormammu access to Earth by channeling the terror and hatred provoked by Nazi bombings of England. Fortunately, Strange followed Mordo into the past and won the help of Nick Fury and the Howling Commandos; Dormammu was given little time to jog his memory regarding the Commandos when Strange and Fury disrupted the ceremony, scattering Dormammu's mystic essence throughout time and space.
Months later, Strange, following his own arduous confrontation with Shuma-Gorath, healed himself via processes that took him through various dimensions; unknown to Strange, a portion of the incorporeal Dormammu attached himself to his foe during one such passage and, when Strange returned to Earth, possessed the sorcerer's body as he had first planned years before. Possession of a human body exempted Dormammu from his vow, and he summoned extraterrestrial sorcerers, including Agamotto's now-renegade tentacled disciple, as his lieutenants. Dormammu vowed to oust the unfathomable Celestials themselves as the greatest power in the Earth dimension, but Strange, his consciousness having fled into a rat, lured Dormammu into blasting him with mystic power, enabling him to rebuild his astral form while his ally Topaz exorcised Dormammu's presence.
Undaunted, Dormammu returned to the Dark Dimension, luring Strange by unleashing the Mindless Ones upon Earth, then trapping him in helpless symbiosis with Clea. Perhaps in nostalgia, he invited Umar to share his reign once more, then banished her anew when she predictably turned against him. Dormammu's invasion of the Earth dimension met unlikely resistance from Baron Mordo, at last weary of Dormammu's abuses and hoping to claim Earth for himself. As Strange and Clea freed themselves, Umar, with Mordo as her champion, forced Dormammu into a compromise, promising him his own dimension to begin anew but neglecting to mention it was that of the Mindless Ones, who were as eager to assault Dormammu in their domain as they had been in his. Umar claimed rulership of the Dark Dimension, with Mordo as consort, but soon Dormammu, in the guise of the Faltine Flyx, lured Clea into gathering mystic allies among the Lords of the Netherworlds to depose her mother. This freed Dormammu to reclaim his realm, becoming more powerful than ever before. Strange, although greatly weakened after losing much of his own power by renouncing the Principalities who patronized him, confronted him alongside a new team of Secret Defenders. Giddy with power, Dormammu gloated that humanity's own evil nature, demonstrated by the horrors of the very wartime era in which he had fought Strange and Fury, proved its need for his rule, then contemptuously dismissed his enemies and, soon afterward, allowed Strange and the human-alien hybrid Darkhawk to seal a breach between the Dark Dimension and Earth's technological Cyberspace, indulgences he doubtless regretted later.
When the Guardians of the Galaxy, heroic adventurers from the 31st century of Earth-691, traveled to the modern era of Strange's Earth-616, Dormammu, on a whim, followed them back to their home era and attacked their Drydock headquarters, demanding the presence of Doctor Strange, himself known as the Ancient One in the Guardians' era. The future Strange and his disciple, the alien Krugarr, rose to the challenge, but neither Krugarr, the Guardians, nor their associates the Galactic Guardians could prevent Dormammu combining his own power with that of his future counterpart, from slaying Strange at last. However, careless from his victory, Dormammu allowed himself to be overwhelmed when the Guardians unpredictably teleported him throughout their ship and attacked him in succession with non-mystic powers unfamiliar to him, forcing him to return to his home time and realm.
Whether as a result of his travels through time or of the reality-altering War of the Seven Spheres, Dormammu, despite victory over not one Doctor Strange but two, suffered severe power loss, reducing him to a humanoid husk while Clea led a rebellion against him. Retaining his throne but slow to recover his power, Dormammu bound his essence to a minor demon, Underchild, to enter the Earth dimension unnoticed, where he manipulated the mutant Jonathan White into granting mystic power to others, strengthening his master via millions of worshippers. Although Doctor Strange soon ended this gambit, the revitalized Dormammu launched his most ambitious scheme yet in a war against the demons and death-gods that governed Hell itself, through which he planned to reach Earth. With Satannish as his lieutenant, he captured two-fifths of his targeted regions but was driven out by the united power of his adversaries, rallied by the heroine Hellcat. Dormammu's own realm suffered attack by the vastly powerful Archenemy, whom even the Mindless Ones could not overwhelm, forcing his own alliance with Mephisto and dozens of other demonic rulers of the so-called Splinter Realms before the creature was finally destroyed by the sorceress Magik (Amanda Sefton), but not without severe damage to all realms involved.
Perhaps hoping to recoup his losses, Dormammu attacked the Earth dimension once more. Strange again scattered Dormammu's essence throughout the dimensions, but Dormammu, anticipating this ploy, released the Mindless Ones on Earth; when Mister Fantastic of the Fantastic Four used his technology to force the Mindless Ones back, he inadvertently drew Dormammu back to Earth. Strange nevertheless defeated him, daring to tamper with time itself to ensure victory, but Dormammu resurfaced months later, driven to irrationality and speaking of a childhood and parents he had never had. Umar humored him while, via a shift in the Cosmic Axis, the pair's power increased to such an extent that they were able to overwhelm Eternity entirely. Immersed in Eternity's essence, Dormammu re-made the Earth into his own hellish domain, with a Doctor Strange doppelganger as his lackey; his endeavors were opposed by the true Doctor Strange and the Defenders, but ultimately it was Umar, having taken a liking to the Hulk, who thwarted him, claiming his power for her own and restoring Earth. Dormammu was apparently reduced to a ranting human, but there is little doubt he will return.
While in Limbo, the recently resurrected Illyana Rasputin attacked various other demons looking for her soulsword and the original bloodstone amulet. This did not go unnoticed by Mephisto, Blackheart, Satannish, Dormammu and Hela.
Dormammu tasked the Hood with finding Doctor Strange and usurping his position as Sorcerer Supreme. Doctor Strange fell to the power of the Dark Dimension, forcing the New Avengers to reach him and battle Dormammu as the fight for the new Sorcerer Supreme continued. Dormammu later assaulted the New Avengers, Doctor Strange and Daimon Hellstrom directly in the Earth dimension, only to find Brother Voodoo bearing the Eye of Agamotto to come forth and intervene against him. Dormammu was exorcised from Parker through the joined efforts of Doctor Strange, Daimon Hellstrom and Brother Voodoo. He was banished to his own Dark Dimension once again, having failed to rise as the Sorcerer Supreme or destroy the chosen one. Loki enigmatically offers to aid the Hood afterwards.
Dormammu was interested in the zombie virus, thinking it as a perfect weapon to make his conquest of Earth far easier, with the Sorcerer Supreme having erected defensive magical screens around the dimensional boundaries to bar him from directly acting on the plane, and commanding the Hood to secure it. Later, when Jennifer Kale became terrified at the sight of the zombie virus mutating into an airborne form, Dormammu appeared before her, and offered her his power. Kale eventually accepted his power when the situation appeared hopeless and the Man-Thing fell, with the Hood forsaken.
Suitor to Satana
Dormammu was one of the five demons who wanted to marry Satana Hellstrom, and like the other demons went out on two dates with her to prove that he had the best chemistry with her. Satana did not want to be forced to marry any of the demons and so went to Deadpool for aid, since Doctor Strange was busy. Deadpool went to kill the demons (who disguised as geeks), when he was greeted by Dormammu (who was using the alias of Mark) he sliced his head off, however upon the reveal that the five "geeks" were in fact demon lords, Dormammu's head re-attached to his body and he revealed his true form, Deadpool questioned why the "big shot demons" would want to marry Satana when they could get all the women they wanted, and they explained that the one who married Satana would be given Hell as property, as she was heir to Hell. After asking about how the demons knew so much about pop-culture, Deadpool fled in terror.
The five demons decided to gamble to decide who would marry Satana, and the winner was Asmodeus, much to the annoyance of Dormammu. However this proved perilous to Asmodeus, as Deadpool killed him with magic imbued swords, and thus Satana did not have to marry anyone. After Deadpool defeated Asmodeus, Satana noted that he was lucky that it was not Dormammu who had won the gamble, otherwise things would have ended far differently.
After the agents of S.H.I.E.L.D. had taken down the Magic Bullet factory with the help of Scarlet Witch, one of their own - Fitz - was revealed to be under Dormammu's Mindless Plague, he used a magic bullet to shoot Scarlet Witch, allowing Dormammu to tap into her Chaos Magic and spread the Mindless Plague to many people, both normal and superhuman alike, from most intelligent to least intelligent.
The plague spread across the Earth with no magician around to stop it, and the S.H.I.E.L.D. agents headed to get Doctor Strange's help, having a new team of Howling Commandos composed of the least intelligent heavy hitters hold the line. The agents arrived in the Dark Dimension, and found that Dormammu had captured Strange. After trying to use a magic bullet against Dormammu and failing, they brought in the Absorbing Man to hold back Dormammu, having him take on the properties of Dormammu's Black Dechantment throne to resist him. Absorbing Man was then tricked into destroying Dormammu's throne, ending the plague as the agents escaped back into their own dimension. However, the backlash sucked the new Howling Commandos into the Dark Dimension, where they repeatedly attacked the incapacitated Dormammu before they were rescued.
The Last Annihilation
In a bid to steal power from Dormammu to empower himself in preparation for the Reckoning War, Doctor Doom orchestrated a venue for Dormammu to invade Earthspace. Sister Talionis manipulated Ego the Living Planet into joining the cult of the Brethren of the Forgotten Flame and conducted a self-sacrificial ritual that encased him in a black shell. After days of incubation, Ego hatched from the egg possessed by Dormammu.
The dark lord and his endless wave of Mindless Ones targeted five planets: Hala, Skrullos, Spartax, Aerie and Chitauri Prime; each a world where a star-spanning race had been born, with the intention to conquer them and use them as a galaxy-sized magic pentagram to summon the entirety of the Dark Dimension. In the process, Dormammu funneled his power into Ego to grow his puppet a planet-sized body. When Dormammu was preparing to conquer Spartax on his own, Doctor Doom led a portion of the Guardians of the Galaxy into Chitauri Prime, and carried out a ritual to siphon the power from Dormammu's possession of the Chitauri into himself. This caused Dormammu's power to falter, giving the rest of the Guardians of the Galaxy a window of opportunity to use the Retaliator Mark II to fire a giant bullet of Mysterium, an anti-magic metal, infused the combined power of Nova's Nova Force and Star-Lord's sun powers. The bullet punched through Ego at light speed, killing him and banishing Dormammu to the Dark Dimension.
Dormammu is considered more powerful than Lucifer, Marduk, Mephisto, and Satannish and apparently served as the creator of the latter. Dormammu is of sufficient skill and might to tamper with the spells of Odin against his will, as the Lord of the Dark Dimension did once to revert Thor back to his mortal guise. Dormammu had sufficient magical power to hold his own against clashes with Agamotto (a spawn of one of Earth's Elder Gods with power enough to stalemate Galactus) when the latter served as the Marvel Universe's first Sorcerer Supreme, even aided by an alien disciple; to this day, the Vishanti regard him as their prime enemy and that of the Sorcerer Supreme. As a representative of Lord Chaos, Dormammu also held the upper hand in a formal game of cosmic chess against Odin, who was representing Master Order, but it ultimately ended in a draw as Odin wished. According to Loki, Odin speaks of Dormammu as an equal, whereas Dormammu considers Odin as an inferior. He has even dared to directly challenge Eternity itself, and in one case even overcame the entity. Dormammu even claims that he will destroy the Celestials, burning them in the Flames of the Faltine. However, there are still limits to his might. For example, the demon known as Zom has been referred to as more powerful than his sister Umar, and thus possibly himself (although his power has increased greatly on a few occasions since then); and after he had effortlessly defeated all the Avengers and Defenders combined, including Thor and Doctor Strange, the Scarlet Witch used a hex on the Evil Eye of Avalon, to make it absorb the overconfident and distracted Dormammu.
From Strange's lone duels with the fallen Faltinian being to his conflicts with him aided by the Defenders and other allies, Dormammu, frequently displays enough power to "ravage a cosmos" and destroy the entire Marvel Universe. Dormammu's power combined with the magic of the Evil Eye was enough to destroy an entire reality (Earth-616), invading not only Earth, but the Sol system, and the worlds of the Kree, the Skrulls, the Badoon, the Titans, Warlock and other "off-worlders." Dormammu even claims his Flames of the Faltine are powerful enough to enable human sorceresses baptized with them to destroy any zombie with a thought, while a thousand separate realities have all fallen to the zombie infection and it is deemed virtually incurable. Dormammu's full powers combined with those of Umar's were enough to overwhelm Eternity and actually tap into his powers to alter all of reality itself into one in his own image, Earth-5113.
- Sorcery over the Flames of the Faltine: Dormammu is composed of pure mystic energy, eclipsing even the greatest of sorcerers in terms of raw power and the ability to manipulate the forces of magic, including Doctor Strange and the Ancient One. Dormammu is virtually indestructible and immortal due to his energy form composed of raw magical energy which is increased and replenished, at least partially, by worship throughout various dimensions. Dormammu has also shown himself capable of besting wielders of the Phoenix Force.
- Banishment: Dormammu can banish all from his domain (the Dark-Dimension) but usually opts to fight them.[verification needed] Dormammu once was capable, even in Earth's dimension, where his powers decrease, of imprisoning the Elder Goddess Gaea at the center of the Earth; it took Clea, adept apprentice of the Sorcerer Supreme using a complex spell fueled by the combined power of Zom and Oshtur to release Gaea from Dormammu's magic, and it took Gaea the joined force of all the spiritual essences of the Earth's living beings to banish him.
- Superhuman Strength: Dormammu possesses some degree of superhuman strength. He is capable of using his magical powers to augment his strength, enabling him to lift well in excess of 100 tons.
- Astral Projection: Among many of his powers, he is capable of inter-dimensional, and near limitless astral projection.
- Matter Transmutations: The ability to alter and shape object in his Dark Dimension to a weapon of his choosing.
- Inter-dimensional Teleportation/Transportation: Creating portal allows him to view and/or step both within or between other dimensions, as well allowing to transport power and object through them.
- High-Speed Flight: Dormammu can use his mystical energy to enable himself to fly at supersonic speeds.
- Transformations: Compose of mystical energy allows him the ability to manipulate himself with relative ease changing his appearance and his size as to cause massive growth.
- Elemental Control: Dormammu can call on the elements to do his bidding.
- Time Travel: Though capable of this it seems to drain Dormammu of his powers causing him to not use it.
- Invulnerability: Dormammu is nearly immune to harm both physical and mystical.
- Size Alteration: Dormammu can increase his size to incredible levels, which greatly increases his strength.
- Immortality: Dormammu is completely immune to aging. He had lived for thousands or even millions of years and has never aged a day.
- Regenerative Healing Factor: His race is immune to diseases and toxins and can recover from almost any injury no matter how severe.
- Energy Projection: Manifestations ranging from force bolts and cursed conflagrations to magically-constructed beings, or empowering others to such a point that the empowered one wields power dwarfing even that of a dimension's Sorcerer Supreme.
- Energy Absorption: He can draw upon the power of the entire Dark Dimension, but is somewhat more limited when present in another dimension.
- Resurrection: Parker Robbins has recently used the powers of Dormammu to resurrect the villains that were killed by the Scourge of the Underworld (Basilisk I, Bird-Man II, Black Abbot, Blue Streak I, Cheetah, Cyclone I, Death Adder, Hijacker, Human Fly, Letha, Megatak, Mind-Wave, Miracle Man, Mirage, Titania I, and Wraith I) to form a squad that would help him take down the Punisher.
- Super-Genius Intelligence though not Omniscient as he claims he is still considered a Super-Genius compared with the rest of the universe.
- Master Martial Artist: Trained in an extra-dimensional fighting style, Dormammu is a capable hand-to-hand combatant, but was once bested by the well-trained, in Martial Arts, human Doctor Strange when neither was using mystic powers.
- Dormammu's magical powers are stated and shown to be weakened when on Earth or in any other dimension not of his own, failing to pierce Earth-616's dimensional boundaries directly from the Dark Dimension when they were secured by the spells of the Sorcerer Supreme; even a temporary dimensional aperture with other dimensions has been shown to weaken him, sapping his mystic prowess sufficiently that the Sorcerer Supreme of the Earth dimension could rival him in direct magical combat.
- Despite Dormammu's enormous power, Minoru's mystical Staff of One has been claimed by the dark wizards the Minorus of the Gibborim-formed Pride to be capable of making him tremble.
- 1990 Marvel Universe Trading Card #69
- The DC Comics super-villain Dreamslayer of The Extremists is based on Dormammu.
- 142 appearance(s) of Dormammu (Earth-616)
- 15 appearance(s) in handbook(s) of Dormammu (Earth-616)
- 40 minor appearance(s) of Dormammu (Earth-616)
- 79 mention(s) of Dormammu (Earth-616)
- 17 mention(s) in handbook(s) of Dormammu (Earth-616)
- 24 invocation(s) of Dormammu (Earth-616)
- 113 image(s) of Dormammu (Earth-616)
- 8 quotation(s) by or about Dormammu (Earth-616)
- 6 item(s) used/owned by Dormammu (Earth-616)