Dragons Washing Away The Skies

Mere minutes later, Cain's Spiritual Sea quivered. 

Cain felt as if he was continually breaking through an endless number of invisible walls. And at the same time, his familiarity with Lightning Law deepened by hundreds of times. 

Cain's comprehension advanced from the Middle Stage to Late-Stage and then Peak Stage, Threshold Success! 

At this moment, Cain had fully comprehended the full 90% of Major Lightning Law's essence. He could now control 90% of Major Lightning Law's essence to his very whims. 

The process seemed incomparably smooth, nearly to the point of making this breakthrough process a leisurely process.

However, if Cain did not have Heavenly energy fusing into his entire being, this breakthrough process would have even taken him weeks to cross. 

Comprehension of all various Source laws is even stricter than Heaven and Earth's Origin energy.