The big tree has extremely powerful vitality and strength. It is definitely the one that can best restrain a Taoist master like Ji Ning who has lost his true spirit! As long as Bo Wanyue is not stupid. He fully understood that "the life of the big tree restrains Beiming Dao Lord", but he would not let him go. He waited until all his men were lost and his Dao Guard Building was almost conquered before he let him go....