"Master, you can check it as much as you want." Chen Lei said.
"Okay!" Su Mu was not polite and started to examine Chen Lei directly.
However, no matter which thunder character Su Mu randomly checked, Chen Lei was able to recite it without hesitation at the first opportunity, and even draw it on paper.
Su Mu randomly checked Chen Lei's more than twenty thunder characters in a row. Chen Lei did not make a single mistake and did not hesitate at all. It was obvious that Chen Lei really memorized these more than one hundred thunder characters.
After testing it herself, Su Mu showed a satisfied smile on her face. Chen Lei's comprehension was something she had never seen in her life, surpassing any genius with amazing comprehension.
In terms of comprehension, no one can compare with Chen Lei.
Su Mu then said to Chen Lei, "Chen Lei, you have passed the first level of comprehension. The next step is to test your root bones. I have a bone-testing stone here, which is a treasure that can test your root bones. This bone-testing stone is naturally formed. You just need to hold this stone, and this bone-testing stone will bloom with five colors: purple, gold, green, red, and black. As long as it blooms any one color, you have passed the level of your root bones. If no color appears, your root bones have failed, and you cannot become my disciple."
Chen Lei nodded and agreed naturally. Now he would just cooperate with whatever Su Mu said.
Afterwards, Su Mu took out a stone. This stone was grayish white in color. At first glance, it looked like an ordinary stone, but if you looked closely, it had a different meaning and contained some kind of mysterious avenue.
Su Mu handed the stone to Chen Lei.
"You just need to hold this stone. No other action is required." Su Mu's voice sounded in Chen Lei's ears.
Chen Lei nodded, then gently held the bone measuring stone.
After Chen Lei held the bone-measuring stone, he suddenly felt a strange wave emanating from the stone. This strange wave directly flowed into the deepest part of Chen Lei's body, deep into his bone marrow.
Chen Lei had no power to resist this kind of fluctuation.
After this fluctuation touched Chen Lei's bone marrow, it directly tested the strength of Chen Lei's bones.
I saw this grayish-white stone begin to change color rapidly, first purple, then gold, green, orange, and finally, pure black.
When the gray-white stone turned pure black, a pitch-black beam of light suddenly shot up from the stone into the sky, reaching the top of the palace and lasting for a long time.
When Su Mu saw this black beam of light, a look of surprise flashed in his eyes.
A black beam of light appeared on the bone-measuring stone, indicating that Chen Lei's bone talent was excellent, the highest bone talent that the bone-measuring stone could measure.
After Su Mu obtained this bone-measuring stone, he had never seen a black beam of light appear.
Obviously, Chen Lei's physique is also top-notch.
At this time, Su Mu was actually very satisfied. Chen Lei had both top-notch talents. Even if his talent in thunder was a little weaker, she could accept it.
Su Mu took the bone-testing stone from Chen Lei and said to him, "Chen Lei, your bone talent is beyond my imagination and fully meets my requirements. Now there is only one last thing missing, which is your talent in thunder. You can cultivate the ancient thunder god's meridian refining technique, so I think your talent in thunder should also be good, but I still need to test it."