Normally a fight against an opponent like the Grand Elder shouldn't have been that easy. Forget about easy, it was going to be a tough fight even for someone like Tianlong Yun.
After all, the Grand Elder was someone who was at the peak of level 9 Great Boundary Ascension Realm, and it was even someone who had started to get enlightened in Laws.
If he managed to keep up the path he had started, in a short time of 10 to 100 years he would have been able to actually ascend and become a Low God.
For someone who had lived at least a millennia 10 years, or 100 years were nothing more than a passing phase of life, just like adolescence, or childhood.
The reasons why the Grand Elder had gone down so easily were actually two. First, he had just been enlightened on the path of laws and had no idea of what they truly represented.