C225 Shang Ni's Killing Intent

Right now, he could only control a wisp of Dark Fog, using this wisp of mist that was called Energy of the Heavenly Tao, and combining it with the Bloodline Soul Locking Formation that Demon Lord had left behind, he was able to prevent himself from sealing the will of the Demon Pupil. He had tried to study the Bloodline Soul Locking Formation