Junior Leopard felt extremely bad after he realized that the destructive vibration was the legendary Infinite Trembling Contemplation.
The Infinite Trembling Contemplation was a well-known secret skill. It was even considered the most powerful secret skill, but it was also considered a boondoggle.
Because this secret skill almost had enlarged the disadvantages of secret skills boundlessly.
It especially required such strong control over Internal Strength, that it was nearly impossible. Just like what Junior Leopard felt from the Odd-shaped Long Sword just now, the Internal Qi flowed at a high speed. Not only did it require strong control, but also consumed tendons and vessels so severely that even a master of Level Nine couldn't unleash it safely and soundly.
Thus, although the Jian Family in Luling had a history of 1,500 years and the secret skill was their house treasure, nobody was known to practice the secret skill successfully.
