Chapter 448 - 248: Legendary Grade Shell, Rejuvenation_3
"[...]
[Xuan Yi, I shouldn’t have doubted the effectiveness of the Yin Yang Technique; I was too stubborn in the past!]
[After your casting, I have felt increasingly youthful these past few days.]
[Within just a few short days, I have already noticed the wrinkles in my reflection fade and my white hair slowly turn black.]
[I never believed such a magical technique could exist, but reality has proven that I was wrong.]
[I am deeply sorry for doubting you. As an apology, I had people collect hundreds of ’cast materials’ for you, and I look forward to meeting you at the Castle Tower.]
[Remember, you said the large barrier surrounding the Castle Tower, set up by the army, wasn’t safe. I scoffed at it before, but now I believe it.]
[Please come to the Castle Tower as soon as possible, Xuan Yi, and reset the barrier for me... Oh, and don’t forget the artifacts required for the Rejuvenation Technique.]
[...]
And the last item was the Token of Extremity, the key to the Forbidden Zone.
[’Token of Extremity of the Castle Tower’ (Key): The golden token is considerable weight, with blood-red tadpole-like runes carved on it, it’s a key to a large Forbidden Zone.]