Chapter 615: Not A Single Drop Left!

The gears in Meng Chao's head turned to perform the last deduction. 

Based on past experience, every time he activated and upgraded a skill, an information flow would explode in his head, causing his muscle fibers and nerve endings to go through drastic changes. 

During the process, he would feel extreme pain and as if he could no longer control his body properly. This would last for seconds at first but could go for even minutes. 

It was the period when he was at his weakest. 

Hence, in the past, Meng Chao only dared to activate and upgrade a skill when he was in a cultivation room or an absolutely safe place. 

The Vortex would never give him dozens of seconds to get stronger. 

However, when Meng Chao looked over to the Vortex, he found that the creature was still struggling in a corner.