Boundless Necromancer (Korean: 나 홀로 주문하는 네크로맨서, RR: Na Hollo Jumunhaneun Nekeulomaenseo)—also widely known as Boundless Ascension—is a high-octane "Tower Climbing" manhwa written by Seong-ho and illustrated by 2B. It has gained a massive following for its "hardcore" survival mechanics and a protagonist who thrives on a terrifying level of obsession and growth.

The story follows Han Sung-yoon, a man who spent seven years trying to become a "Hunter" only to be told he had absolutely no talent. Just as he reaches his breaking point, he is summoned to the Tower of Trials, a multidimensional structure where challengers must clear floors to survive and earn "Ascension." Sung-yoon awakens a unique, "F-Rank" innate ability called "Soul Harvest." While it sounds weak, it allows him to absorb the souls of his defeated enemies to permanently steal their stats and skills. Unlike traditional necromancers who command armies, Sung-yoon uses these souls to turn himself into a "Boundless" close-combat monster.

Alternative Names and Titles
Boundless Necromancer / Boundless Ascension / 나 홀로 주문하는 네크로맨서 / Oneulman Saneun Gisa

Core Characteristics & Tropes
Combat-Centric Necromancy: This series subverts the "Summoner" trope. Instead of hiding behind skeletons, Sung-yoon is a frontline bruiser. He uses the energy of harvested souls to enhance his physical body, effectively becoming a "One-Man Army."

The Tower of Trials: The setting is a brutal, interdimensional testing ground. Players are often forced into "Death Matches" against warriors from other worlds, creating an atmosphere of constant, high-stakes tension where only the most ruthless survive.

Unlimited Scaling: Because his growth is "Boundless," there is no level cap. Every floor cleared and every rival defeated adds to his permanent pool of strength, leading to a satisfyingly rapid "Overpowered (OP)" progression.

Visceral Art Style: The series is praised for its sharp digital art and dynamic action choreography. The use of vibrant blue and dark purple hues to represent "Soul Energy" makes the combat scenes visually stunning and easy to follow.