Sir Feng Lei

The unexpected was beginning to take place, making thick sweat to roll down his head. 

The red glowing crystal began to merge with his body, creating a surprisingly pleasant sensation for Lu Shang's eyes; yet, what surprised him the most wasn't the feeling, but rather how the strange crystal merged, forming an even bigger one before they disappeared into his body. To his surprise, he felt no pain, which baffled him. Why was there no discomfort or any reaction at all, despite the red light merging with his body?

After some time, Lu Shang felt no significant changes in his body except for the fact that he could see everything clearly in bright white light. 

Being curious, he observed his inner body only to find out that the red light was gathering around his martial core, which had already turned completely black.

Additionally, he felt something strange in his heart area, particularly near his chest region.