On his way to the Elf Domain, Zhou Yan did not continue his Enlightenment, but instead constantly refined Jiang Tianling and Jiu Que, using their primordial evil spirit aura to restore his Eternal Spirit's primordial damage.
Other energies might be somewhat lacking, but the energy of these evil spirits has an excellent restorative effect on Zhou Yan's Eternal Spirit.
And Zhou Yan is not entirely unfamiliar with the energy of evil spirits; on the contrary, he is quite proficient. Therefore, Jiang Tianling and Jiu Que's energy greatly benefited Zhou Yan's recovery.
This process is not complex, but the journey that would originally take about half a month to return to the Elf Domain took Zhou Yan nearly two months.
During these two months, Zhou Yan refined Jiang Tianling and Jiu Que, using most of their energy to heal the wounds of his Eternal Spirit, while a small portion was used to proliferate Thunder Flame Breaking Path Mountain.
