The Serpent was a relatively modern addition to the Marvel Comics canon, conceived specifically to serve as the central antagonist for the 2011 company-wide crossover event, Fear Itself. He was created by writer Matt Fraction and artist Stuart Immonen, making his first official appearance in Fear Itself #1 (June 2011). Fraction designed Cul Borson to be a force of nature, an entity that could believably challenge the entire roster of Marvel heroes, including the might of Asgard itself. His creation was part of a narrative push in the late 2000s and early 2010s to introduce “event-level” threats that could sustain a major crossover storyline. The Serpent's identity was intentionally shrouded in mystery in the initial issues to build suspense, with his true connection to Odin serving as a major plot reveal. His design, both in his humanoid form and his final, monstrous serpent form, was crafted by Immonen to evoke a sense of ancient, primal dread, distinct from the more technological or cosmic villains common in the Marvel Universe.
The history of the Serpent is a tale of forgotten history, familial betrayal, and the brutal foundations upon which Asgard was built.
Cul Borson is the firstborn son of Bor, the former ruler of Asgard, and the elder brother of Odin. In the primeval ages, long before Thor was born, Cul was the heir to Asgard's throne and its most revered king. However, his reign was one of conquest, brutality, and terror. He believed that the only way to ensure order and loyalty was through absolute fear. His philosophy was simple and savage: “Obey, or die.” He was a popular and successful ruler, as his methods brought victory and spoils to the Asgardians. A prophecy, however, foretold his downfall. It stated that Cul would be defeated and killed by Odin's son. Enraged and paranoid, Cul's tyranny deepened. The breaking point came when a young Odin brought a peaceful delegation from another realm to Cul's court. In a fit of rage and suspicion, Cul slaughtered the entire delegation, an act that finally turned Odin against him. Odin, seeing the monster his brother had become, rallied a small group of loyal followers and went to war against the Serpent. The conflict was cataclysmic, scarring the very fabric of Asgard. Ultimately, Odin proved victorious. Using his own immense power, he did not merely imprison his brother; he attempted to erase him from existence. Odin sealed Cul in the deepest part of Earth's ocean, the Marianas Trench, and cast a powerful spell that wiped the memory of the God of Fear from all minds, mortal and divine. History was rewritten, with Odin positioned as Bor's direct and rightful heir. For countless millennia, Cul Borson slumbered in the crushing dark, forgotten by the universe and even by the brother who had condemned him. His only legacy was the whispered legend of “The Serpent,” a bogeyman in Asgardian lore, whose true identity as the former All-Father was lost to time. His reawakening was orchestrated by Sin, the fanatical daughter of the Red Skull. Guided by her father's old texts, she located a mystical hammer in Antarctica, becoming its wielder, Skadi. This act served as a beacon, allowing her to find Cul's undersea prison and shatter it, unleashing the God of Fear upon a world that had no idea he ever existed.
Cul Borson, The Serpent, does not exist in the Marvel Cinematic Universe (Earth-199999). He has never been depicted or referenced in any film, television series, or supplementary material related to the MCU. However, a thematic and narrative parallel can be drawn with Hela Odinsdottir, the primary antagonist of the 2017 film Thor: Ragnarok. The comparison is highly relevant for understanding how Marvel Studios adapts complex comic lore for the screen:
The adaptation of Hela for the MCU likely drew upon the core dramatic conflict of Cul's story—the “skeleton in the closet” of Asgard's royal family. By making Hela Odin's daughter and Thor's sister, the filmmakers created a more direct, personal, and emotionally resonant conflict for the protagonist, streamlining the complex family tree of the comics for a cinematic audience. Therefore, while Cul himself is absent, his narrative spirit can be seen in the MCU's version of Hela.
Cul Borson is an elder god of Asgard whose power, particularly when fueled by fear, rivals and in some aspects exceeds that of his brother Odin.
The Serpent is the personification of tyranny. He is arrogant, cruel, and utterly convinced of his own divine right to rule. He does not see himself as evil; rather, he views himself as the purveyor of the universe's most fundamental truth: fear is the natural order. In his eyes, hope is a delusion, love is a weakness, and freedom is a chaotic path to self-destruction. He believes his rule, while brutal, is ultimately a kindness, as it provides a clear and unwavering structure to existence. His millennia of imprisonment have left him with a deep, festering hatred for Odin. He views Odin not only as a usurper but as a hypocrite who built a kingdom of “peace” on the foundations of the conquest and terror that Cul himself pioneered. He takes sadistic pleasure in tormenting his foes, particularly those who represent hope, like Captain America, seeking to break their spirit before he breaks their body. Despite his immense power, he revealed a moment of vulnerability and perhaps regret after his defeat, suggesting that beneath the millennia of rage, a sliver of the brother Odin once knew might have remained.
Cul's powers are vast and multifaceted, placing him firmly in the “skyfather” tier of cosmic beings.
^ The Worthy ^ Original Identity ^ Transformed Name ^ Key Feats ^
| Angrir, Breaker of Souls | The Thing (Ben Grimm) | Kuurth, Breaker of Stone | Fought Red She-Hulk; laid waste to Yancy Street. |
| Kuurth, Breaker of Stone | Juggernaut (Cain Marko) | Nul, Breaker of Worlds | Fought Thor; was only stopped when Cyttorak removed his power. |
| Nul, Breaker of Worlds | The Hulk (Bruce Banner) | Skirn, Breaker of Men | Fought Thor; nearly caused a seismic event in the vampire kingdom. |
| Skirn, Breaker of Men | Titania (Mary MacPherran) | Mokk, Breaker of Faith | Battled multiple hero teams in Chicago. |
| Mokk, Breaker of Faith | Grey Gargoyle (Paul Duval) | Greithoth, Breaker of Wills | Turned the population of Paris to stone. |
| Greithoth, Breaker of Wills | Attuma | Nerkkod, Breaker of Oceans | Fought Namor and Doctor Strange; devastated New Atlantis. |
| Nerkkod, Breaker of Oceans | Absorbing Man (Carl Creel) | Skadi | Fought the Avengers in Washington D.C.; battled Captain America. |
| Skadi | Sin (Sinthea Schmidt) | The Serpent (Cul Borson) | Served as Cul's primary herald and the catalyst for his return. |
As stated previously, The Serpent does not exist in the MCU. Consequently, he has no depicted abilities, equipment, or personality in this continuity. If such a character were to be adapted, one could speculate that his powers would focus heavily on psychological manipulation, similar to how Scarlet Witch used fear-based illusions in Avengers: Age of Ultron, but amplified to a divine, world-threatening level. His equipment, the Hammers, would likely be presented as dark reflections of Mjolnir, a concept the MCU has already explored with weapons like Hela's Necroswords and Gorr's All-Black.
Cul is a tyrant who rules through fear, not friendship. His “allies” are his subjects and pawns.
The Serpent's existence in Marvel Comics is almost entirely defined by a single, massive storyline.
This event is Cul Borson's definitive story, detailing his return, his war on Earth, and his ultimate defeat.
1. Awakening: Freed by Sin/Skadi, a weakened and aged Cul emerges from the Marianas Trench. He immediately dispatches his hammers across the globe.
2. **Gaining Power:** As his Worthy spread chaos and fear worldwide, Cul feeds on the resulting terror, rapidly regaining his youth, strength, and godly power. He establishes his fortress, Dark Asgard, in Antarctica. 3. **Confronting America:** He personally travels to Washington D.C., where the Avengers confront him. He delivers a chilling speech to the world, proclaiming his godhood and the new age of fear. In a shocking display of power, he effortlessly breaks Captain America's shield. 4. **War with Asgard:** Odin, knowing the threat his brother poses, attempts to quarantine Earth and forcibly evacuate the Asgardians, planning to burn the planet to destroy Cul once and for all. Thor defies his father, returning to Midgard to lead the resistance. 5. **Final Battle:** The Avengers, armed with Uru-enchanted weapons forged by Tony Stark in Asgard's workshops, manage to defeat the Worthy. This forces a final confrontation between Thor, wielding the Odinsword (Ragnarok), and The Serpent, who transforms into his colossal serpent form. As the ancient prophecy foretold, Thor slays his "uncle," but takes only nine steps before succumbing to his own mortal wounds and dying in the arms of Odin. A victorious but grieving Odin takes his brother's corpse back to the ruins of Asgard, his spirit finally broken. * **Aftermath:** Though defeated, Cul's influence lingered. The world was left to rebuild from the devastation, and the heroes were left to mourn Thor (who would eventually be resurrected). In a follow-up story in //The Mighty Thor//, a powerless and humbled Cul is briefly made the regent of Asgardia by a grief-stricken Odin, forced to rule with humility and wisdom as penance for his crimes before being permanently imprisoned in Asgard's dungeons.
As a character created for a specific, major event, Cul Borson has very few notable variants in alternate realities. His story is deeply tied to the Earth-616 continuity.