Hunter x Hunter: Transmigrated with Character Extraction System - Chapter 431: HHES -

[Revenge • Power Couple • Sweet & Savage]Qi Yuan died on the altar of her own love—watching the man she adored marry another.As her soul slipped away, one figure stormed the chapel: Shen Family’s untouchable heir, eyes scarlet, cradling her body like shattered glass.Then she is reborn on her wedding night with Shen Family’s heir.Debt list: every blade that cut her, every smile that watched her fall—paid in blood.Collateral: the man who once buried her dignity now buries enemies for her.By day, he is ice—“Divorce? You speak when I allow it.”By night, he is fire—“Stay, or I’ll chain the world to keep you.”Qi Yuan came for vengeance; she stayed for the storm that answers only to her.

Fang Shen’s eyes undergo perplexing changes after being hit by thunder. The change helps him acquire inscrutable and powerful life-death eyes which are able to launch many functions like clairvoyance. With the superb and magical eyes, he can dominate the world.

- Description from Novelupdates

Zylus has always felt suffering; everything in his life has always been against him. Everything had consequences. Now, as he lay empty, with his family taken away from him, he sought revenge on the ones who did it. And what better timing than for a levelling system to appear. Now he must go on missions to seek strength, to grow and pursue his goal. But first, he must transcend the demon realm, as he finds out. He's a demon.[Analysing User Data][33%...67%...98%][100%][User's Data Analysed!][Welcome To Your Demonic Weapon System...] -> [Zylus Elwis]Discord Link: https://discord.gg/tyQj98KY

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates