Looking at the introduction of the Blood Spine Sword, Gu Liangyuan frowned slightly.

This magical artifact is somewhat eerie.

However, it's not a big problem. Given that Song Xian'er is a reincarnated immortal, she should be able to handle this bit of ominous energy.

With a single thought, one can become an immortal or a demon; it can be used as a trump card.