Over 6500m/s!

Cold.

A chill, similar to staying in an ice cave, went straight to his heart.

In Xia Fei's half-conscious state, he swallowed that white pearl, which started to melt the moment it entered his body. Strands of energy, imperceptible to the naked eye, rapidly traveled throughout his body, aimlessly flowing everywhere. He felt an intense pain in his internal organs, and the cold aura left Xia Fei looking very pale.

The pain he was feeling far surpassed any of what he had experienced taking Phantom's medicines before, and it was essentially an inhumane torture.

Xia Fei abruptly opened his eyes while still in that lakewater, his mind regaining clarity. Those strands of energy had agitated him and accelerated his mental energy recovery. However, the amount of energy released was simply more than what his body could take in. He felt a stab of pain on his chest as if something was about to gush out from his abdomen.