The dialogue with the King of Devils quickly came to an end after his soul possession. Even if the devil that rules the devil race acquired control of one of his creatures' souls, he wouldn't be able to hold onto it for very long since the original soul would be destroyed if it was taken by another.
The Devil King's soul wisp link was exhausted since Devil Tanlan's soul's limit of endurance had been surpassed. As a result, once Devil Tanlan passed away, both his link to the soul and the contract his soul had with the King of the Devils vanished.
Hei Anjing and Xia Jieye were led to the courtyard that had been set aside for them after exiting the underground chamber. The Crown Prince personally led the way as they proceeded through a row of trees.