PS: This chapter is a bonus update for reader YellowTail's donation of ten thousand Qidian coins.
Su Xin had settled the matter of the Huanxi Lineage, so the moment he returned to the Northwest Circuit, he immediately entered seclusion.
He had gained quite a lot from this trip to the Ancient Battlefield, and the martial arts insights left behind by Great Emperor Fengdu were especially useful to him.
As for the Blood Slaughter Avici Hell Sword Canon obtained from the Phantom Demon Path, Su Xin also intended to cultivate it and integrate it into his Blood River Divine Sword.
The Blood Demon Scripture had been adapted from the Spirit-Shifting Blood-Exchange Technique Su Xin was currently cultivating, but the various cultivation methods and secret techniques it contained far outnumbered those of the Spirit-Shifting Blood-Exchange Technique.
After all, the Spirit-Shifting Blood-Exchange Technique had merely been the foundation laid down by the Great Heavenly Demon Venerable in the past, while the later Blood Demon Scripture had been continuously expanded and supplemented by more than ten generations of Blood Demon Sect powerhouses.
The Blood Slaughter Avici Hell Sword Canon truly deserved its reputation as the Blood Demon Sect's strongest sword technique. Its power was immensely strong and incomparably sinister, a typical demonic art.
Yet Su Xin's cultivation of it went quite smoothly. After all, he had already cultivated the Spirit-Shifting Blood-Exchange Technique and thus possessed the foundations of the former Blood Demon Sect. His Blood River Divine Sword was also highly similar to the Blood Slaughter Avici Hell Sword Canon, so there were no major obstacles in cultivating it.
In truth, if Su Xin wanted to raise his strength as quickly as possible, the best method would still be to use the Spirit-Shifting Blood-Exchange Technique to absorb the blood of Yang Spirit Realm martial