After the way of the weapons, there was the second large category, the laws of the five elements!
The five elements, Metal, Wood, Water, Fire and Earth could be cultivated to an extreme and pushed to the pinnacle of martial arts. If one could combine the five elements into one, one could go one step further.
Besides the five elements, there were the laws of nature.
One could use the powers of nature such as Wind, Snow, Thunder and Lightning and the power of crumbling mountains and tsunamis.
Once the laws of nature were cultivated to an extreme, they could also be combined into one. A warrior could become an embodiment of Heaven and Earth, holding onto the power of the Creator.