C144 strange forbidden technique

"The Demon Lord was furious." You're lucky to be able to return from the The End of the Sky and the Horn of the Sea. From now on, you should just stay here and not go anywhere. " The Demon Lord had never told Li Xuntian about his confinement.

Although Li Xuntian was helpless, in order to let the Demon Lord calm down, he secretly investigated the matter regarding the forbidden technique