Excruciating Pain

According to the , he first needed to inject, eat, or absorb the stimulant into his body. Once it was in his body, he needed to circulate it throughout his body according to the instructions.

Therefore, after telling the system to remind when five hours were up, he closed his eyes and willed some of the refined energy to appear in his first spirit vein. Once it appeared, he carefully started circulating it through his spirit veins. 

Initially, he felt comfortable all over, but soon, the comfort morphed into discomfort and then excruciating pain. He was feeling as though he was being stabbed by thousands of sharp needles.

'Argh!'