I am a Late Bloomer in the Immortal World我在修仙界大器晚成

The MC is a middle-aged man or a guy, I don't remember, I've been reading for a long time. He was sold as a servant who looks after horses in a large clan. He finds a fist technique or something, finds a way to buy his freedom.

He doesn't have any cheats, only one advantage: time and stable cultivation without bottlenecks, that is, he develops slowly and breaks through easily, and the more he ages (lives) all the better for his talent.

The character is balanced, knows how to make friends, adapt, can think coldly, in other words, he is the most ordinary person, only a little more selfish and afraid of death.

The world is based on martial arts, and there is not a single immortal sect within 1000 km, MC starts with martial arts and finds friends of geniuses (clan heads, princesses, rich guys), creates a secret organization covering the entire kingdom, exchanges knowledge with others, gathers with friends, searches for mysterious "immortality" because the MC was able to cultivate one technique thanks to his talent.

They are looking for immortality as an organization, and after 10 years of searching, they finally find one complete technique.

Then they enter the path of cultivation together, compete with each other, MC will become the core of organizations because of his talent, time passes, his friends die one after another due to old age and bottlenecks, and he accepts their grandchildren into the organization, and the interaction continues.

I forgot to mention that he got married when he was in the clan, his wife is smart, a daughter will appear later. His wife dies of old age when he turns 70-90 years old, and he will stay with his daughter, I don't remember exactly.

Over the years, MC has studied alchemy, arrays, talismans, etc. Well, you get it. There are many conspiracies between the characters in the novel.