The Low-Key Sword Saint

In his previous life, youthful arrogance cost him everything. When he opens his eyes again, he finds himself in the vast land of the Nine Continents, reborn as the so-called useless eldest disciple of a powerful sword sect. After dying once for being too high-profile, he has only one goal in this life: stay low, avoid trouble, and live quietly. Unfortunately, fate has other plans. When his master is ambushed by hidden enemies, he is forced to reveal just the smallest hint of his true talent. That single glimpse is enough to shake the sect, stun the world, and make everyone question the same thing: Was this “useless” senior brother ever weak to begin with? — Description from novelcodex.org