Being abandoned is quite pitiful.
But that's exactly what Wei Cheng wanted.
Until now, his strategies had basically been executed smoothly.
For the Human race's Mountain and Sea Brigade, he proposed a quick method for cultivating Thunder Spirit Roots which allows the Human cultivators to stabilize their footing. Although the Mountain and Sea Brigade may still be weak offensively and unable to initiate an active attack against the Alien demons, they can hold their position and await assistance with no problem.
And this itself would restrain a large number of Alien demons as well.
Of course, Wei Cheng knew his limits, considering he had to stick with the human's side in the future, he couldn't leave any traces. Even the seventy substitute human cultivators would die one after another in the following days.
By wiping out all the evidence and clues, even if the Human Ancestor Temple sends a stronger Fairy Monarch in the future, they wouldn't be able to find anything related.