However, Yun Ying certainly could not do it now. Leaving aside the many Undying Kings in the Foreign Realm, the Origin Ancient Artifact alone was certainly not something an Immortal King-level being could touch at will.
And opening the Origin Ancient Artifact would certainly be even harder, beyond what an Immortal King could accomplish.
"Ultimately, it still comes down to strength. The Emperor realm-I will reach it!"
Gathering her thoughts, Yun Ying's gaze became completely calm, but her Dao heart grew even firmer.
Next, Yun Ying continued studying this wisp of Darkness Origin.
Several days passed, and Yun Ying gained a little understanding of that wisp of Darkness Origin.
"As expected of power from beyond this world. It is virtually indestructible in this world, and it can erode a living being's flesh and Primordial Spirit, influence their disposition and consciousness. It is utterly demonic."
Yun Ying looked at the wisp of Darkness Origin in her palm and murmured to herself.
Perhaps because it came from an Undying King, this wisp of Darkness Origin was exceptionally pure, rarely seen in the world.
Even a True Immortal here would be unable to resist erosion by this level of power of darkness and would soon transform into a Dark True Immortal, no longer themselves.
"Still, I can use this power from beyond the world to temper my Sword God Dao. It is an excellent whetstone."
She thought of this. Under the tempering of this power from beyond the world, her Sword God Dao would certainly improve astonishingly.
Thus, Yun Ying began using this wisp of Darkness Origin to temper her Sword God Dao.
During this tempering, Yun Ying discovered to her surprise that the power of that wisp of Darkness Origin was quietly merging into her Sword God Dao without any visible sign.