Obviously, the best and most badass way is to ascend to the Supreme Unity stage through self-cultivation, which implies further potential.
The Six Sages of the Heavenly Path, Demon Race Four Emperors, Twelve Ancestor Witches, as well as Xuandu, Ksitigarbha, Primordial Monarch Doumu, and the disciples of the Heaven Connecting Sect, are all in this group.
But external forces can also further enhance one's innate talent.
The Supreme Unity stage can't be conjured out of thin air, for example, making the current Ji Changsheng directly into a Da Luo Warrior, which is beyond even Hong Jun, the Cultivation Path Ancestor.
However, Zhen Wu is already on the threshold of Da Luo, even half a step into it already.
At this time, Zhen Wu doesn't need much assistance. He just needs an external force to provide some help and he can push open the rest of the door.
Helping a student improve from 99.5 to 100 is within the capabilities of the Cultivation Path Ancestor.