Waking up in his twelve-year-old body, Adom immediately faces the reality of his regression when he confronts his childhood bully, Damus Lightbringer. In his previous life, Adom's passivity led to the tragic suicide of his best friend Sam, but this time, he refuses to play the victim. When Damus corners him in the academy courtyard, Adom shocks the surrounding crowd by weaving a complex, third-year Aegis Barrier without using hand gestures or a grimoire. As Damus strikes the shimmering shield and recoils in pain, Adom doubles down on the surprise, channeling raw mana into his fist to deliver a crushing blow directly to the bully's jaw. The impact shatters the courtyard's silence, knocking the arrogant noble heir out cold and earning Adom his first system stat increases. This explosive reversal instantly alters the social hierarchy of Xerkes Academy, cementing Adom's reputation as a dangerous wild card and catching the attention of powerful factions. Adom reunites with a living, healthy Sam, sharing an awkward but deeply emotional moment that solidifies his resolve to protect his friend at all costs. He begins to navigate the dangerous political waters of the academy, knowing that the Mage Council executes anyone suspected of manipulating time or death. He must hide his regressor status while utilizing his advanced knowledge of runes to stay ahead of his peers. The victory over Damus is sweet, but it is only the first step in a long and grueling path of self-improvement. As the whispers of forbidden magic spread through the student body, Adom realizes that his actions have painted a target on his back, and the shadows of the academy are already shifting to eliminate this new threat. He must quickly find a way to balance his academic responsibilities with his secret preparations for the coming conflicts. The peaceful days of his youth are officially over, replaced by a desperate race against time to build his strength before the first catastrophes strike. He starts training his weak body, using the system to measure his physical progress, but the peace is shattered when he realizes that his actions have drawn the attention of the city's criminal underworld.

Determined to fund his search for a cure for Lifedrain Syndrome, Adom travels to Redcliff Valley to locate a legendary leprechaun's treasure hoard before its historical discovery. Utilizing his Identify skill, he uncovers an ancient runic concealment array on a cliffside cave and solves a shifting dwarven riddle to gain entrance. Instead of a simple cave, he is teleported directly into the Serpent's Labyrinth, a massive treasury guarded by a colossal, ten-level White Wyrm. The beast is immune to his fire magic and steel weapons, forcing Adom to use his analytical mind to survive the encounter. He lures the giant serpent into a trap, utilizing the cavern's natural acoustic crystals to disorient the beast before driving his sword deep into its vulnerable underbelly. The wyrm's acidic blood bathes Adom completely, triggering a painful integration process that unlocks a rare passive skill called White Wyrm Body. This unique skill promises to enhance his physical resistance every time his body suffers damage, turning his physical fragility into his greatest defense. He successfully loots fifty thousand gold pieces into his newly purchased dimensional bags, securing the initial capital needed to purchase rare alchemical ingredients from the black market. The sheer scale of the treasure chamber far exceeds the historical records of his previous life, suggesting that the original discoverer had only scratched the surface of this ancient vault. Adom realizes that the labyrinth was constructed by the Architects of the Third Age, containing masterwork weapons and rare crystals of immense power. He carefully selects the most valuable gems and mana crystals, avoiding the heavier artifacts that would encumber his retreat. The physical toll of the battle is immense, leaving his twelve-year-old body bruised, bloodied, and exhausted, but the system notifications confirm that his stats have surged. His life force cap increases, and his inventory slots expand, providing him with the utility needed for his future operations. He successfully navigates his way out of the maze using a hidden transportation crystal, returning to the surface just as the dawn begins to break over the cliffs. The acquisition of the gold is a massive victory, but the encounter with the White Wyrm leaves him with a deep appreciation for the dangers that lie ahead. He is no longer just a scholar reading about monsters in books; he is a combatant who must face them head-on. The black market awaits, and with it, the mysterious broker Cisco, who holds the key to the rare ingredients Adom needs to survive his impending illness. But as he steps back into the light of the city, he realizes that the scent of the wyrm's blood has drawn a different kind of predator to his trail.

To build his physical strength and get closer to the creators of the apocalyptic weapon Dragon's Breath, Adom joins the academy's Combat Athletics Club. Led by the enthusiastic sixth-year Hugo Faible, the club subjects Adom and Sam to a brutal regime of physical conditioning, stretching, and boxing fundamentals. Adom utilizes these grueling sessions to train his White Wyrm Body skill, taking measured hits to increase his physical resistance while slowly expanding his mana pool. Through Hugo, Adom gains an introduction to Professor Kim, the brilliant but eccentric researcher destined to discover the principles behind Dragon's Breath. Visiting the professor's chaotic laboratory, Adom is shocked to find the early prototype of the weapon sitting unguarded on a shelf. Recognizing the danger, Adom uses his advanced knowledge of future magical theory to subtly sabotage the research, suggesting alternative, non-linear absorption patterns that will lead the professor down a dead-end path. This calculated intervention stalls the development of the weapon by years, potentially saving millions of lives from the future wars that once devastated the continent. However, his academic insights arouse the suspicion of Hugo, who begins to question how a second-year student possesses such advanced theoretical knowledge. Adom must play the role of an eccentric genius, balancing his performance to maintain access to the laboratory without revealing his regressor identity. The stakes grow higher as the system warns him that the first symptoms of his Lifedrain Syndrome are only two months away, and his alchemical order with the criminal broker Cisco has been delayed. He must push his body to its absolute limits, completing a grueling ten-mile run under an hour to unlock the rare passive skill Iron Lungs, which dramatically increases his stamina and oxygen efficiency. The physical transformation is agonizing, but the system measures his progress with cold precision, showing him that his strength and agility are steadily rising. Meanwhile, he continues his secret training sessions with Sam, helping his friend find his own magical confidence by using himself as target practice for wind spells. The constant training builds a deep bond between the two friends, altering the dynamic of their relationship and preparing Sam for the dangers of the future. But the peace of the academy is a fragile illusion, as the criminal underworld of Arkhos is descending into pure chaos. The Children of the Moon, an organization of vampires and thugs, are actively hunting for the young mage who disrupted their operations in the Undertow. Adom realizes that he cannot simply hide behind the school's wards forever; he must take the fight to his enemies before they corner him. As he prepares for his next move, he discovers that his companion, a mysterious black cat he rescued from the Undertow, is far more than a simple stray. The creature watches his training with an unsettling intelligence, hinting at a deeper connection to the ancient magic of the labyrinth.

Trapped within a deeper layer of the Serpent's Labyrinth alongside the grumpy leprechaun Bob, Adom must face the deadly Test of Wisdom guarded by the ancient sphinx Alexandros the Knowing. The sphinx strips their senses one by one for every incorrect answer, forcing Adom into a dark, silent void where he must rely entirely on touch and his analytical mind. Through a shared dream-walk initiated by Bob's unique fae magic, Adom solves the complex riddle of betrayal, restoring his senses just in time to face the sphinx's final, impossible puzzle. Recognizing that the creature will never let them leave alive, Adom uses his runic expertise to modify his dimensional bag, transforming it into a highly unstable spatial vacuum. He lures the intellectually curious sphinx close by claiming to possess the secret of time travel, then triggers the collapse of the pocket dimension. The resulting vacuum sucks the massive creature into the bag, allowing Adom to deliver a decisive, bloody blow with his Flamebrand sword, severing its head and completing the trial. This unprecedented feat earns him the rare achievement of sphinx slayer and a massive surge in his system stats, though the heart of the beast is lost in the collapsed dimension. After escaping the labyrinth, Adom travels to a nomadic Veyshari camp on the beach, where the sorceress Mirela performs a sacred blood ritual to break the powerful curse on his black cat companion. To his utter shock, the cat transforms into Morgana, a beautiful woman with striking blue eyes and a mysterious connection to his past. The ritual requires the sacrifice of a sheep, its life force channeled through ancient runes to dissolve the deep-seated transformation magic that had bound her. As Morgana takes her first tentative steps in her human form, Adom is struck by a profound sense of déjà vu, realizing that her face is intimately connected to the secrets of the ancient Architects who built the labyrinth. Mirela reveals that the runes on the Grimoire of Law, which Adom recovered from the trial chamber, are of giant origin, pointing him toward a distant, perilous journey to the eastern mountains to find the extinct creators of magic. The discovery of Morgana's true identity adds a massive variable to his plans, as her presence was completely absent from any of the timelines calculated by the ancient mages. Adom must now protect her from both the academy's scrutiny and the criminal factions that are still searching for the cat. With his newly acquired glasses, which integrate the Sphinx's monocle to allow him to perceive mana flows directly, Adom prepares to meet Cisco to finalize his plans for the destruction of the Children of the Moon. The threads of his second life are tangling into a complex web of ancient magic, criminal warfare, and forgotten history. He is no longer just trying to survive; he is rewriting the very foundations of the world's magic, one choice at a time.