In the ancient era, before the knowledge of the upper realm existed, cultivators used to call it 'dao' power. This was because the release of Core Formation power contained unique effects limited to the cultivator, previously termed 'dao rhymes'.
However, with the discovery of higher realms and even the immortal realm, this term was naturally shifted because how dare mere third realm fellows call their meager form of energy dao power or anything related to that? Even Immortal Emperors in the upper realm didn't dare call their conceptual abilities the 'dao', terming them as laws.
But in Firmament Heaven, the period between the discovery of the Core Formation realm and the Nascent Soul realm eclipsed the time it took cultivators to find the way forward from both Qi Refinement and Foundation Establishment by more than a hundred times.
