Chen Changsheng called constellations and coordinates. More precisely, he indicated a position of the Yeshi Step.
The Yeshi Step was the innate supreme skill of the Demon race's Yeshi clan. The Demon Imperial clan could also learn it, but in the past several decades, only Nanke had gained a complete grasp of it. Chen Changsheng had only managed to learn this movement technique by relying on his understanding of the Daoist Canon, indescribably monotonous calculations, and his awareness of the star charts on the Heavenly Tome Monoliths.
After calling out these coordinates, Chen Changsheng shook his right sleeve. The swords howled through the air and blocked the Heavenly Demon Horn that had been stealthily making its way through the darkness. He stepped on a star position and his body vanished. He left the ground, taking step after step into the night sky, making his way to higher and higher altitudes.
The many swords followed him, gradually returning to the sheath along the way.