In Lucius's Primal Land, each of his souls and avatars were surrounded by 9 powerful cores covered in diverse runes that peacefully rotated behind the respective soul.
In the 9th step, Core formation, the cultivator had to create small cores by condensing their innate essence and aspect runes.
The core created from this amalgamation would have many uses as he advanced in his cultivation path but currently it allowed two major things.
Through his cores, he could now freely use his infinite essences as he saw fit. Before he could only use a slither of it as his body wasn't powerful enough to bare the power of infinite energy but now that his souls were powerful enough and that the cores could act as a path he could do whatever he wanted.
The second thing it allowed was for him to be able to evolve his essence into its higher forms through the tempering of the cores. Through it, with enough effort, he could evolve his essence into 9th-grade energy, the Exior grade.
