Fiendgod/Ki Refining Differences

There were two primary paths of training to become an Immortal.

The first was in Ki Refining, refining ki energy! 99% of those who trained to become an Immortal chose this path. This path allowed one to use many mysterious Immortal treasures, create complicated golems, control large amounts of deadly magical beasts, develop powerful magical formations, and also use some extremely vile techniques…in a word, this was an extremely glorious and profound path.

The other path was in Body Refining.

Supposedly, the three Realms had each given birth to many Fiendgods. All of them were born from nature itself and were powerful from their birth! As for the creator of the universe, Pangu, he himself was the mightiest of them, the Fiendgod of Primordial Chaos. He also possessed the most powerful body…and thus, a number of elders managed to develop this ‘Fiendgod Body Refining’ technique, which would allow the practitioners to possess bodies on par with Fiendgods. Indestructible bodies, possession of boundless strength, having three heads and six arms, regenerating from a single drop of blood, immortal and undying…these all belonged to the Fiendgod Body Refining method.

Book 1, Chapter 6