A Soul Bead can store a person’s soul force and provide feedback on whether that person is alive or dead. However, the soul force stored within a Soul Bead has a limited duration. Once that time passes, the soul force dissipates completely, and the bead loses its ability to reflect the status of its owner. At that point, fresh soul force must be infused into the bead for it to resume its function.
After a quick calculation, Bai Wuji, Sect Leader of the Xuantian Immortal Sect, realized that the soul force in his son’s Soul Bead had reached its expiration point exactly half a month ago.
"Senior Brother Yuxuan… he was killed!"
Chapter 2862