While their clones kept watch over the Peak Sects, Gravis and Mortis split up to check for the remaining Laws they wanted to comprehend.
Gravis went to the bottom of the world and stopped above the silver wall. The gravity around this place had made everything else irrelevant with its sheer power.
Gravis would focus on the True Law of Gravity. There was no True Law of Primordial Forces, but space, time, and gravity were still part of the same subset of Laws. Knowing all three of them gave one more power in manipulating them.
Mortis searched for an isolated place and concentrated on his Spirit.
They were only missing the Law of Soul Infusion. With that, they could combine all the other Laws of Life and finish the True Law of Life.
The True Law of Sentience already gave Gravis and Mortis full control over their Spirits, which made the comprehension of Soul-related Laws far easier.