Sword Heart Profundity.
All along, Netherworld King had never really felt much about this talent, thinking it wasn't particularly useful.
But what he didn't realize was, the reason why Netherworld King's Sword Dao realm could advance so quickly—so much faster than anyone else at his level—was exactly because of Sword Heart Profundity.
In fact, when Grandpa Medicine passed down the Ash Fire to Netherworld King, if it weren't for the uniqueness of Sword Heart Profundity, Netherworld King wouldn't have been able to absorb it so perfectly and break through to the Flame Origin Realm.
After all, comprehending the Dao Law also requires one's state of mind.
At that time, Grandpa Medicine also remarked that he was astonished Netherworld King could break through to Flame Origin Realm in one go.
Xuanyuan Suxian and Li Che watched the scene, stern expressions on their faces.
