The Lei Ling Corpse was the external incarnation he had prepared for himself, and his 'good disciple' was nothing but a mere medicine man to cultivate the corpse for him.
The Controlling Spirit Holy Puppet Sect's research into corpse cultivation and soul possession was profound. The Lei Ling Corpse was inherently ferocious and the risk of rashly possessing it was too great; if he were to possess the Lei Ling Corpse, having a predecessor take the hit for him would greatly increase his chances of success.
For this reason, when he first encountered his 'good disciple,' he was ecstatic and spared no resources to cultivate him.
Yet today, all of it had crumbled to dust.
As he clenched his teeth in anger, his mind was once again filled with doubts.
"When Lord Tan Lang was besieged by us, there were no shortage of True Monarch Realm powerhouses present, but when he left, he deliberately set up a ruse with great effort to kill my 'good disciple.'
"Hss~"
