Feng Xia's usual principle was…
Just try.
The result of this attempt was quite gratifying. He had successfully comprehended the Knife Heart even though he had never used the knife before. This was a great achievement that countless knife cultivators dreamed of!
However, there was still a small flaw and it was slightly different from what he had expected.
—The Knife Heart had been refined, but the Sword-Heart was gone…
Where did his Sword-Heart go? It was such a big Sword-Heart. Had anyone seen his Sword-Heart?
"Oh, no… I understand now!"
Fortunately, after the initial confusion, Feng Xia finally punched his palm and realized the crux of the problem. "There's still a subtle difference between this kind of Knife Heart and the kind of Knife Heart that is directly comprehended. Mine is transformed from my Sword-Heart. The two are one and the same, so they can't exist at the same time."