Daimon Hellstrom was born in the fictional town of Greentown,
Massachusetts. He is the son of
Satan and a mortal woman named Victoria Wingate (his father was later
retconned to be the demon
Marduk Kurios). Daimon and his younger sister,
Satana, were trained by their father in the art of
magic, tapping into the power granted them by their dark heritage. However, while Satana
embraced her heritage, Daimon clung to his humanity. When their mother discovered who her husband really was, she was driven insane. Daimon and Satana were separated and put in different homes after their mother was institutionalized and their father banished back to Hell. Daimon grew up in a
Jesuit-run orphanage, never hearing a word from his father or sister. He became a professor of
anthropology at
St. Louis University. He then set himself up as an
occult investigator and defender of humanity, battling dark arcane forces — primarily those of his father — under the name of the "Son of Satan", as a
demonologist and exorcist. In his first appearance, Daimon battled Satan and the Witch-Woman alongside the
Ghost Rider. Soon after that, he began a long association with the
Defenders by helping them battle Asmodeus (the leader of the Sons of Satannish) and
Satannish himself. He also helped the Defenders battle the third incarnation of the
Sons of the Serpent. He then encountered Satana for the first time as an adult. After
Steve Gerber ceased writing the book, Hellstrom began working at the
University of the District of Columbia Parapsychology Department, where he had a friendship with Seripha Thames, a female professor who was a
Wiccan. Following these events, he was rarely seen for a while. One of his few recorded adventures during this time was again with the Defenders, battling the
Hulk. He returned to a more active role when he became involved with the Defenders yet again, this time becoming an active member of the group. He worked with the team to battle the
Six-Fingered Hand, and was taken to Hell by Satan. He was subsequently expelled from Hell by Satan and rejoined the Defenders. Hellstrom later married his teammate
Patsy Walker, also known as Hellcat. Alongside Hellcat and the
West Coast Avengers, he later battled
Master Pandemonium,
Allatou, and the
Cat People. He later exorcised
Lincoln Slade's spirit from
Hamilton Slade's body. Alongside the West Coast Avengers again, he battled
Seth's forces. Daimon and Patsy retired from adventuring and Daimon went on a personal quest for meaning. He traveled to a monastery where the Miracle Man had taken refuge. When the Miracle Man stole Daimon's "Darksoul", Daimon discovered that he was human, but he was also dying. Patsy eventually used a dark magic book in Daimon's possession titled the
Grimorum Verum to summon "Satan" and pleaded for him to save Daimon's life. However, to do this, Daimon had to regain his Darksoul and once again become the "Son of Satan". Daimon was re-imbued with his essence, but upon witnessing Daimon's "true face" of evil, Patsy went insane. Daimon kept her away from prying eyes in his estate at Fire Lake, where she spent most days either asleep or babbling seemingly randomly. She would remain there until one day she regained enough sanity to weep for having brought back such evil into the world, and committed
suicide with the aid of
Deathurge. Now calling himself "Hellstorm", Daimon ultimately discovered a way to finally defeat his father. Daimon discovered his father's secret true name – Marduk Kurios – and used the power of this knowledge to finally kill him. Daimon then became the new "Satan", ruling over his father's realm of
Hell. He later used this power to allow
Hawkeye and the
Thunderbolts to resurrect Patsy from the dead. In the three-issue miniseries
Hellcat, Daimon told his wife that he was never truly the son of Marduk Kurios; his true father was
Satannish, who was himself the son of the Dread
Dormammu. Daimon claimed he had been fathered as part of a plot to take control of the various "Hell" dimensions. These claims, however, contradicted Hellstorm's established history. It has since been revealed that Hellstorm was deliberately lying to Patsy when he made these claims; his love for Patsy led him to push her away in the hopes that she would be happier without him. Hellstorm used this claim to assume control over Satannish's realm and inherit Dormammu's right to rule as designated by the powerful "Flames of Faltine". However, without either Satannish or Dormammu backing Daimon,
Mephisto was able to gain control of the vast majority of "Hell". Daimon was recruited by
Kyle Richmond for the
Defenders as part of the Fifty States Initiative. Working outside of the Initiative, this team was later forcibly disbanded by
H.A.M.M.E.R. Daimon was then brought to A.R.M.O.R. to join the
Midnight Sons in facing an
interdimensional zombie threat. The Midnight Sons headed to Taino to contain the zombie virus, but ended up in a battle with the
Hood's forces. During the course of the outbreak on the island, Dormammu possessed fellow member
Jennifer Kale, though Daimon exorcised him from her. The mission ended up a success, though the
zombie Deadpool's head escaped. He was sought out by
Doctor Strange as a potential claimant of the title of Sorcerer Supreme; however, he was attacked by the Hood first, who was attacking potential magic users who could also claim the title and, helped by him and
Brother Voodoo (now going by Doctor Voodoo as the new Sorcerer Supreme), they managed to banish Dormammu, leaving the Hood powerless for a while. Sometime around the Dark Reign, Hellstrom, after being informed by a Satanist priest of the existence of the Antichrist, vowed to slay the boy and, joining once more with his former girlfriend Jaine Cutter, rescued the Ghost Rider from the renegade angel
Zadkiel's forces, and eventually the united Ghost Riders from all of history were able to reclaim Heaven, overthrow Zadkiel, and triumph over the forces Satan had unleashed against them. During the
Chaos War story line, Hellstrom rose from the pits of Hell itself to inform the newly assembled "God Squad" that his father's fiery realm had fallen to the hordes of
Amatsu-Mikaboshi and that all the dead souls of the Underworld were now under his thrall. Hellstrom joined forces with the God Squad and pitted his demonic powers against those of the enslaved
Zeus,
Hera and
Ares, to little avail, and later journeyed with them in a last desperate attempt to seal Mikaboshi in
Yomi. In the series
Avengers Undercover, Daimon Hellstrom appears as a member of the
Masters of Evil. When
Cullen Bloodstone and the other surviving heroes from the series
Avengers Arena infiltrate
Bagalia, Hellstrom helps Bloodstone to control his Glartrox form. When the heroes are apprehended by
S.H.I.E.L.D., Hellstrom rescues them and returns them to Bagalia, where
Helmut Zemo invites them into the Masters of Evil. Hellstrom later appeared as a teacher of
Strange Academy, where he teaches Inferno alongside
Magik. ==Powers and abilities==