Li Meng comprehended the first volume. After multiple repeats, he finally managed to touch the essence of it. Just how incredible was the man who formulated an art like this. The main reason for Li Meng's awe was the laws which went into the building of this art.
The Dominator's fist was an art which not only contained the essence of elemental laws but even included the secret of Ying-yang and Taoism in it. There was even the inclusion of fist and weapon intent within the attack, which made it such a dangerous, yet effective attack. The major reason behind Li Meng's choice of using it as a last resort is the fact that he couldn't bear the burden which comes with the execution of said art.