Heart realm did not have a direct enhancement to a person when it came to combat power. But its auxiliary function was too powerful!
Along the way, this Heart Like Still Water already helped him for God knows how many times.
Essence energy realm increase was not something hard to Ye Yuan. But heart realm was different.
He knew that if there wasn't any heaven-defying fortuitous encounter, wanting to breakthrough to Heart Like Monolith Realm was too difficult.
If this Nine Characters True Word Formula could really advance heart realm, then its benefit was huge.
But this was all just Ye Yuan's deductions. He only visualized the 'Lin' character once and could not even form the first hand seal. How could wanting to break through be that easy?
However, as long as there was a direction to work towards, Ye Yuan believed that he could fumble it out someday.