Cain wasted no time. Once he understood the situation of the war, he immediately returned to his residence, using his lightning spells to cover the entire location in case an intruder approached. Then, he adopted a meditative position.
Calming his mind and freeing himself from all distractions, Cain began to circulate the Soul Devouring Legendary Cultivation Technique. He focused on using the gray flame to nurture his energy pool and advance its crystallization.
The gray flame burst with immense power, surrounding and permeating Cain's energy pool, triggering the crystallization process. The energy consumption was shocking, even faster than before, but the amount that surged into Cain's energy pool was staggering.
What he obtained from the hasty devouring of the Sky Lords was but a tenth of what Cain managed to take from the Legendary dragonborn. It was clear that the purity and power of a True Name were leagues ahead of what normal Spirit Force could grant.