After Gravis and Mortis were done with the Law of Heavenly Fire, they returned to Opposer City to focus on their Form Law.
Instead of using the level seven Battle-Laws, they were using the level nine Elemental Laws.
The level nine Elements already demonstrated pure perfection in their field, which meant that they already included the peak in all their aspects.
There was no Law of Heavenly Lightning's Speed.
There was no Law of Heavenly Fire's Explosiveness.
They were already at the peak.
Over the remaining years before their tribulation, the two of them focused on their Form Law.
Sadly, they only knew two of the nine level nine Elemental Laws, which made their Form Law lacking.
They didn't have the weight of Earth.
They didn't have the sharpness of Metal.
They didn't have the speed of Light.
However, they had the sudden explosive power of lightning and the sheer destructive potential of fire.
