Yuan Ming gazed at the Black Sword in his hands, deep in thought.
This sword was a Nine Rune Magical Treasure, and all its runes were of yin attribute. Each one was extraordinary and evidently handpicked by Qi Ye, among which a "Yin Thunder Rune" was particularly formidable, capable of converting Yin Qi into Yin Thunder for incredibly astonishing attacks.
During the great battle of Three Immortals Island earlier, it was under this Yin Thunder Rune that the soul of the Undying Tree Demon was wounded.
After integrating the Nine Nether Iron contained within the Black Sword into the Soul Destroying Sword, in addition to "Blood Frenzy" and "Yin Thunder," there should be enough capacity to inscribe one or two more runes.
Yuan Ming looked at the other yin attribute runes inside the Black Sword and quickly selected two more.
