"Release your soul." Glancing at the two merman Kings kneeling on one knee, Su Yu said indifferently.
Hearing this, Jiao Lian and Jiao Yun could only obediently release the defense of their soul.
Then, Su Yu planted the demonic seed of the Planting Demon in Cultivation Spirit in the souls of Jiao Lian and Jiao Yun.
It was not quite accurate to call it demon seed. It could be considered a rule seed that Su Yu had condensed with the Planting Demon in Cultivation Spirit.
With the rules of life as the foundation, once Jiao Lian and Jiao Yun had any thoughts of rebelling, this rule seed would directly absorb their soul power and lifespan to grow.
This method was comprehended by Su Yu's divine soul power under the purification of multiple power of rules, supplemented by the First Volume of the Soul Scripture and the Planting Demon in Cultivation Spirit.