I’m Not an Immortal

"Even if you become an immortal, you cannot escape my sword." She wielded her sword, maneuvering with unparalleled skill, and countless immortals perished beneath her blade. Thus, those who loved such things gave her the nickname: "The Immortal's Sorrow." "The Immortal's Sorrow, the Immortal's Sorrow, even immortals tremble before her." Later, they called her "The Sorrowful Immortal..."