While the 'Monk'ey beast was getting the two disciples, Lin Wu was setting up some things in the tomb. Since the disciples were goings to take the trials, he had to change things up a bit.
The trials that Wang Xiong had taken were modified by Lin Wu and would be far easier for the two of them. Since they had attempted the already far more hard trials of the Sky Bright Daoist, Lin Wu could not let them think that the trials of the Taiji celestial were easy.
Of course, fixing this was rather simple. Lin Wu simply had to return the trials to the default format. That way they will have to pass all the trails before they were able to get the inheritance and meet Lin Wu.
Lin Wu was obviously not going to give up on that and was definitely going to put traces and his crystals in the two disciples as well. This was to ensure that the two of them would not cause any problem in the future and he would also be able to communicate with them in time of need.