Xu Yuan used it as an opportunity to make the God of Light suffer. No one would believe him if he said he had imprisoned a god.
With the King of Decay's temper, he would want revenge. He wouldn't care to verify the facts unless the God of Light appeared personally to explain it to him.
Whether the King of Decay pursued the God of Light or not, it wouldn't affect Xu Yuan in any way.
The King of Decay calmed down a little now that he had found the mastermind behind Xu Yuan's insolence. He stared at Xu Yuan indifferently.
He watched in silence as the statue devoured its remaining power from the tree.
He knew that he couldn't descend onto the Main Plane, so he might as well save his energy to deal with the God of Light.
The King of Decay was curious to know what Xu Yuan would do with the power after devouring it. Would the God of Light appear to take the power for himself?