Some True Gods and True Immortals were much weaker than Ji Ning. They only had the power of an ordinary Daofather, and so Ji Ning was able to easily defeat them. He didn't even gain many insights from battling them, only spending a few hours in meditation afterwards.
After battling the more powerful ones or the ones who had some special abilities, Ning might spend seven or eight days carefully reflecting on their battle.
Twelve months after Ning began his sweep through the prisonworld. He was within a region filled with dark fog where a True Immortal was kept prisoner. Boom! Boom! Boom! The sounds of a major battle could be heard booming out from within the fog, causing the fog itself to roil and roll about.
Within the fog.
"Go!" The seemingly berserk violet-eyed woman pointed towards Ning, causing a sky filled with black light to shoot towards Ning
Ning held his twin swords in his hands, slowly stepping through the air and advancing.