Looking for the weakness

"Now, Chi Chi," Mo Qiang commanded, and the blood trees that were standing still without moving an inch suddenly jumped to life. Their dead-looking branches wrapped themselves around the legs of the Zerg Bat and pulled it down. 

BANG! 

Just as the Giant Zerg Bat was pulled down, Mo Xifeng charged at the beast. She raised her mecha sword and swung it hard on the neck of the beast that was struggling to climb back to its feet. 

'Damn, why is it not working?' Mo Xifeng gritted her teeth and looked at the smooth skin of the Zerg Bats. No matter how many times she swung her sword, she couldn't find any weakness of the beast. It was as if it were surrounded by an impenetrable shell. 

Looking at the Giant Zerg Bat, Mo Xifeng couldn't help but think that she was fighting a losing battle. 

But even so, for some reason, Mo Xifeng was not as panicked as she was earlier. Maybe —