Absolute Sword Sense

So WoonHwi, cast aside by his family after a ki rampage shatters his dantian, is kidnapped by the Blood Cult and forced to live as a third-rate spy. Years later, he is killed after being used to find the legendary Secret Records of the Sword Sage. Instead of dying for good, WoonHwi wakes up ten years in the past, on the day the Blood Cult kidnaps him. He also gains the ability to hear the voices of swords.