The crafting of talismans relies on the talisman brush as a medium, through which the talisman master channels their own mana into the spiritual ink, sealing it within the talisman paper.
This was precisely where the issue arose in refining treasure-grade talismans.
The true strength of Zhou Xun's true body mana was at the True Dan level, whereas his talisman brush was merely a top-tier Dharma Instrument.
Chapter 331