The Blood Pattern Sword was a Royal-grade Spirit Martial that Chu Nan acquired while in the Yang Wheel Realm, from some Cloud Sea Realm ruins.
This sword is born of blood, with the potential to be promoted to Emperor-grade Spirit Martial through slaughter.
But ascending to Emperor-grade Spirit Martial is no easy task. Despite Chu Nan's countless killings with the Blood Pattern Sword in the Divine Illumination Realm, he never had the slightest opportunity for such an ascension.
However, when Chu Nan broke through the Yang Wheel Realm, grasped the third-level Blood Martial Intent, and formed the Blood Dao Cloud Sea, an earth-shattering reversal occurred.
Since entering the Cloud Sea Realm, Chu Nan's numerous slaughters, coupled with the nurturing of his Blood Dao Cloud Sea day and night, finally prompted a qualitative change, advancing from Royal to Emperor-grade!
