Gravis sat down and gathered all the different insights of all the different element-specific Battle Laws he had comprehended.
Then, he isolated the element-neutral aspects of these Laws, leaving about 33% of each Law behind.
All of this only took Gravis a couple of days.
After that, Gravis looked at the best aspects of the remainder, leaving behind only about 15% of the different element-specific Battle Laws.
This took Gravis a couple of weeks.
However, that still left far too much. After all, 15 times 14 was 210. This meant that Gravis had to reduce the Laws yet again.
This time, it took Gravis a couple of years. It took so long because Gravis had to test the effectiveness of the different aspects and compare them to each other. He also had to see if these aspects could work with each other.
In the end, about 10% of each Law was left. He only had to reduce it a bit more, but it was already proving to be quite challenging.