In the character's origin story "Blood Price", Khalid Nassour is a twenty-two year old
summa cum laude graduate and aspiring physician who is chosen by Bastet to inherit the Doctor Fate mantle. With the support of the Egyptian deities, archangels connected to his Muslim faith, and the spirit within the helmet, Nabu the Lord of Order, he is tasked with overcoming the foe, Anubis. While initially reluctant to take the role, he accepts the role and manages to defeat the god, the victory marks the beginning of his journey as Doctor Fate. Struggling to balance his dual life due to his limited supernatural knowledge as he battles various foes interconnected to those around him, Nassour encounters his great uncle, who reveals himself as his predecessor. Nassour is freed by
Kirk Langstrom, explaining to both Justice League Dark team members and allies of Nabu's plan to destroy the Sphere of the Gods, the source of magic and various mystical dimensions in the DC Universe, to kill off the magic-eating Otherkind and is assisted by other Lords of Order. With the efforts of a chaos magic-empowered Justice League Dark and other allies, Nabu and the Lords of Order are defeated. In the aftermath, Nassour joins the team on a consultant basis but rejects the idea of being Doctor Fate in place of Nelson even at his mentor's insistence.
The All-New Doctor Fate The sorceress
supervillain Circe founds the
Injustice League Dark and strikes at the team with her newfound power, possessing Hecate's mystical power, revealed to be a progenitor of magic in the
DC Universe. When she strikes a powerful blow to the Justice League Dark, Nassour responds by donning the helm once more, officially succeeding Kent and plays a critical role in defeating the Injustice League Dark and later bringing balance of the elemental forces. Nassour becomes involved in the efforts to defeat Upside-Down Man but is rendered unconscious in the battle and is replaced by Kent, who sacrifices himself and depletes the helm in the process but allows an opportunity for Zatanna to ultimately defeat the villain. Nassour later partners with Langstrom to restore power to the helm but becomes inhabited by Hauhet, who replaces Nabu and grants him disturbing visions of his impending defeat and destruction of the Tower of Fate. He helps the JLD battle an evil
Merlin who seeks to control magic and resurrects
Arion, a Lord of Order intimately connected to a nearly uncontrollable source of magic. He also helps various heroes (
Flash, etc.) with both his mystical and medical expertise while taking in
Stitch, a teenaged, animated, non-binary ragdoll as his apprentice and sent them to Teen Titans Academy to learn the values of heroism. Shortly afterward, following the seeming death of the Justice League's core members, he joins the Justice Society and helps in efforts to defeat
Pariah and the Great Darkness. Khalid later appears in
Geoff John's 2022
Justice Society of America series as a major character, although his history differed since his appearances in prior titles due to the series' assertion that becoming Doctor Fate takes place one year prior to the series despite having been implied in his title to have been Doctor Fate since 2015 and his graduation to a physician implying a longer period of time passing since becoming Doctor Fate. Nassour is also involved in the
Knight Terrors and
Absolute Power crossovers, among the heroes captured in the latter by
Amanda Waller's
Amazo robots. In the 2024
JSA series, Nassour is a featured character although his history within the series deviates from prior appearances once again, instead casting him twenty-one in age and regarding him as a youthful and inexperience incarnation of Doctor Fate despite retaining history from prior runs and appearances. In "Infinity, Inc. vs the Justice Society of America", Nassour and other members battle a newly formed Injustice Society led by
Wotan and
Johnny Sorrow while trapped in
Hell inside the Tower of Fate as they target the Helmet of Fate, having already stolen
Ted Knight's technology and seeks the artifact and the Staff of Destiny. Although the situations pushes Nassour to the brink, he is notable supported by his new mentor,
Wildcat. Unknown to them, the mysterious disappearance of the roster, alongside Sorrow's impersonation of
Obsidian and mysterious condition inflicted on
Jakeem Thunder, has caused friction in the remaining JSA members, former members of
Infinity, Inc. Despite their defense, the Injustice Society prevails in acquiring the helm, with Wildcat killed in the process and separates
Hawkman and
Hawkgirl from the group. Nassour also makes a cameo appearance in 2025
New History of the DC Universe series, which revises his history slightly by making him the fourth incarnation of Doctor Fate (retroactively omitting certain past incarnations) and his origin story (Blood Price) being taken place between the "
Darkseid War" and "
Dark Nights: Metal" storyline. == Characterization ==