The Bloodline Purification Array was aboard the Deep Sea Monster Fish.
Lan Zao and Zi Di had already benefited from it.
However, the conditions were not yet ripe for Cang Xu to purify his bloodline.
He was still lacking two conditions.
The first condition was that he needed to clearly understand what exactly his Undead Bloodline was, especially after the Bloodline Mutation.
The second condition was that the Fishman youth's Blood Core needed to collect the corresponding Undead Bloodline. Only with the corresponding Blood Core demon energy infused into the Bloodline Purification Array could the purification be carried out.
Regarding the first condition, Cang Xu, through his own efforts, had ingeniously acted in the face of crisis and obtained the Middle-level Soul Vein inheritance, owning the spell that could detect the Undead Bloodline.
But...
He could not yet cast it.
The reason was that he was suffering from Zhou Zhang's double bind of Divine Arts and Spells!