Eternal life begins with saving my clan - Chapter 425 20 Kilometer Sword Light.

Flatten the Devil's Palace, eradicate the demonic cult, slaughter the demon lairs, sweep through the demon realm, dominate the heavens and earth, control the three realms, be the supreme master of the mysterious sect, master of the Nine Yin, the 17th head of the North Star Sword Sect, the Heavenly Fiend Lone Star, the Supreme Sword Soul, the Supreme Infinite Mysterious Heavenly Wishful Great Sword Patriarch... Also known as Iron Egg, known for the wild history of relentless killing.

A continuation from where High School DxD Volume 25 left off.

Zhang Xuan, one of the most shameless MCs in Webnovel history, enters the [Source World], a plane higher than the Firmament. With the complete Heaven’s Path Library that contains the abilities of Heavenly Flaws, Heavenly Order, and Heavenly Nature, he embarks on a journey to dominate the world.Seeking fate, recognizing fate, understanding fate, establishing fate… While you all are still refining fate, finding fate, and borrowing fate, I, Zhang Xuan, possess eternal destiny!(A novel full of face-slapping moments. Even if you haven’t read “Library of Heaven’s Path,” you can enjoy this without reading barriers.)