I Became Invincible Just by Practicing

In ancient times, before Heaven and Earth were divided, Chaos was like an egg. A mighty being cleaved open the primordial void: clear qi rose to form the heavens, and turbid qi sank to form the earth. Only a wisp of Chaos breath remained, condensing into jade and hiding deep within Kunlun Ruins. It was square, shaped like a sheep's shoulder blade, and its markings flowed like the paths of stars. Within it lay three thousand spatial nodes. After seventy-two generations of cultivators refined it, using their blood essence as a guide and their souls as fuel, it finally became the Book of Hidden Heavens, recording the secrets of storing and concealing all things in Heaven and Earth.