This whole proof is for a novel that is not yet indexed. The name of the novel is Lightning is the only way, and it can be added on the OP if it qualifies or not.
Anyways, to start, Gravis (The MC) can release
his Will in a 360 direction, and can compress it as well. (Chapter 51). This is further supported when he released his Will Aura in order to
demonstrate to the Guild Masters its usage/used for a challenge, and shown to have a radius of 30 meters. (Chapter 56). In his fight inside the wilderness,
he activated his Will Aura (Most likely 360 degrees) to lure out a spider.
He was constantly fighting other beasts and they were not frozen, and his will aura was unleashed since he was still in the forest (
This is further proven by stating that him releasing his Will Aura is his actual normal state, and does not take any energy. This is chapter 58 btw), and then stated to be able to freeze a scorpion that was about to him despite being already in his Will Aura range
by concentrating the will aura on the scorpion, freezing it on the spot (Chapter 64).
However, it appears I was mistaken, because it was not mentioned that it was a 2 times increase in this chapter, we just know that it increases in effectiveness. However, in chapter 81 where he is much stronger, it was stated that he can now compress his Will Aura to a 90 degree cone,
increasing its strength by 4 times, and stated that it would be too much for the guy sitting next to him (Who can withstand the normal will aura he was releasing that could freeze and even make other people unconscious).
Not sure if these are enough, but there is another thing that was weird. In chapter 105,
it was stated that the level/realm of a cultivator did not increase their will power (Since Will Power can only be increased in certain situations like a lot of Life or Death battles), but it can decrease the enemy's resistance. It was also stated that cultivators at the same level as him would have some resistance, while those below his level had no resistance at all, and that those at his level would be unconscious (Keep in mind that Gravis' will aura is far stronger than other people at this point). It was also stated that with every level increase, the level of resistance would double. Would this be considered resistance negation and would it be layered?
Not sure if these are enough to consider every 4 times increase, increases the layering, or whether the whole cultivator thing would have layered resistances and resistance negation. If they are not enough, I can try to find other feats.