The Sky-Swallowing Python's soul came from Queen Medusa and possessed a portion of her power. It was a fifth-tier magical beast, equivalent to a Dou King expert.
Generally speaking, fifth-tier magical beasts were no less intelligent than humans. They were exceptionally clever.
It would be extremely difficult to subdue one—to make it lower all its guard before Gu Yi and completely open its heart and soul.
But the Sky-Swallowing Python was different. Though it had been born from Queen Medusa, its soul was like a flawless blank sheet of paper, unfamiliar with everything in the world.
Gu Yi's actions over these past few days were like leaving strokes and traces upon that blank paper, dyeing it with his own colors.
Thus, Gu Yi easily gained the Sky-Swallowing Python's trust, and it became deeply dependent on him.
Still, to be safe, Gu Yi spent another month cultivating their bond.
During that time, he gradually tested the waters, guiding the Sky-Swallowing Python to open its heart.
Only after seeing that the Sky-Swallowing Python no longer resisted any of his actions did Gu Yi begin.
Gu Yi mobilized his Soul Power and the power of the Myriad Worlds Gate, branding his mark into the soul of the Sky-Swallowing Python, which had completely opened itself to him.
This did not mean Gu Yi intended to bring the Sky-Swallowing Python or Queen Medusa across worlds. Rather, after leaving this mark, his restraint over her would become far stronger.
Otherwise, ordinary methods would never be enough to control the proud Queen Medusa.
He could kill Queen Medusa and use Blood Shadow to create a puppet, which would guarantee her loyalty. However, her strength would then be fixed at the Dou Zong realm, and all her potential would be lost.
The mark he left now was far