Jakob emerges from the subterranean labyrinth of the sewers into the grimy streets of the residential district, leaving behind the safety of his mentor’s sanctum to establish his own foothold in the mortal world. Guided by his lifeward Heskel, he encounters the city guards and quickly demonstrates his superiority through violence and tactical precision. He captures a guard named Callum, subjecting him to intricate surgery to graft new limbs and organs, creating a Wrought Servant capable of obeying commands without hesitation. This transformation marks his transition from a trainee in the dark to an independent actor in the public eye. He secures a temporary laboratory within a bakery basement, utilizing the disguise of an apothecary to gather materials and hide his activities from prying eyes. The stakes rise as he realizes the guild and royal guard are beginning to notice the disturbances caused by his experiments. He faces a group of adventurers sent to investigate the missing persons reports stemming from his earlier ventures. The tension escalates when he decides to eliminate threats preemptively rather than negotiate, showcasing his ruthless pragmatism. He recruits a thief named Veks who brings him valuable items from the mage quarter, including tomes on demonology and necromancy. This alliance solidifies his position as a powerful entity within the criminal underworld, allowing him to expand his influence further. However, the shadow of his mentor looms large, and the fear of being discovered drives him to move constantly. The chapter ends with the realization that the city is vast and dangerous, and he must evolve faster than the hunters who now pursue him.

Conflict erupts between Jakob and the established powers of the city as he seeks to acquire rare ingredients for his next grand experiment. He infiltrates the Adventurers Guild Hall to gain information and resources, clashing with officials who view him as a threat to public order. The situation spirals when he attempts to summon a Greater Demon named Mercilla to aid in his fight against rival forces. The summoning goes wrong, unleashing a Viscountess of Voracity that devastates the Market West district and draws the attention of the entire kingdom. The Royal Guard and elite knights mobilize to stop the destruction, forcing Jakob to retreat and regroup. He battles a Wrath Demon named Raleigh sent by his mentor, resulting in massive casualties and the petrification of the battlefield. This event forces him to acknowledge that his current power level is insufficient to challenge his creators fully. He secures a contract with a Greed Demon Lord named Mammon to hide his true intentions and gain protection from the crown. The trial requires him to complete tasks that test his loyalty and cunning while navigating the complex politics of the demon realm. He discovers that even powerful entities can be manipulated if one understands the laws of contracts and names. The climax sees the destruction of the guild hall and the flight of the protagonists to avoid arrest.

Jakob undertakes the arduous task of constructing a body capable of housing a Demon Lord, specifically targeting the form of a dragon to satisfy the demands of Mammon. He gathers materials from across the continent, utilizing the bodies of slaves and monsters to build a colossal construct that dwarfs previous creations. The process involves weeks of labor where he integrates multiple souls and biological systems to ensure the vessel can withstand the presence of a high-ranking demon. Heskel assists in the structural integrity of the bones while Jakob focuses on the magical bindings required to bind the soul. They enter the golden demesne of Mammon where time flows differently, allowing them to complete the work without immediate interference from the outside world. The creation is nearly finished when Mammon betrays them, attempting to claim the vessel for himself. A violent struggle ensues within the mansion of gold, where Jakob uses a Soul-Lock to trap the demon and prevent him from escaping. The twist reveals that Jakob planned this betrayal all along to gain leverage over a powerful adversary. The dragon is successfully imbued with the essence of Mammon, turning the tables on the original agreement. This victory grants them temporary safety and resources, but it also marks them as enemies to the demon lords who seek revenge.

The culmination of Jakob’s journey leads to the summoning of Nharlla, a Great One Above whose power could reshape the world. He gathers the necessary esoteric tolls, including faces given willingly, a relic of virtue, and an eye that witnessed divinity. The ritual site is prepared in a small village where Ciana and Jakob prepare to invoke the entity. As the ritual commences, the final toll is revealed to be the loss of a loved one. Heskel steps forward to become the sacrifice, removing his mask to reveal a human face before dissolving into the ether. This act triggers a massive surge of power that floods Jakob with omniscience and knowledge, transforming him into a Seeker of Knowledge. Ciana receives the power of invincibility in combat, ensuring she can never be defeated. The aftermath changes the fabric of reality, marking a new era where the balance of power shifts drastically. Jakob realizes that his quest for knowledge has come at a terrible price, but it grants him the tools to challenge his mentor once more. The story closes with the trio preparing to hunt down Grandfather to reclaim what was stolen and fulfill the final stage of their plan.