After taking care of the giant ape, Ling Lei quickly left the area along with Ling Wei and their captured demon beasts.
The disturbance caused by Ling Wei when fighting the giant ape would surely draw the attention of many demon beasts which was something that Ling Lei didn't want.
The reason they came out this time was to quietly hunt some powerful demon saints in order to turn them into their demonic blood servants.
Now that the Nine Demon Beasts God was after and almost all the demon beasts in the Divine Demon Beast Region were looking for them, they could only hide because they weren't strong enough to face them.
The strongest amongst them was Ling Lei who was an 8th Tribulation Martial Saint. However, even he wouldn't able to withstand a single blow from one of the Nine Beast Gods.
Even though the army of the demonic blood servants wouldn't be able to help them face the Nine Beast Gods, they would still be of great use to them.