The three methods aren't much different, and once learned, one could mass produce without limit.
However, no matter which method was chosen, there was an unavoidable flaw, which was that Dong Tianyu currently lacked basic materials.
Whether it was Array devices for formation, Talisman paper and Spiritual ink for Talisman making, or Spiritual materials for Artifact Refining, Dong Tianyu had none at the moment.
Not to say there was none at all, the Array devices for formations could be substituted with Spiritual Stones, but if one used this method to set up formations, the Spiritual Stones would continue to be consumed, and the consumption would accelerate if an earthquake occurred.
Although Dong Tianyu lacked Talisman paper for making Talismans, he could resort to using ordinary yellow paper and his own Essence blood to make them. Although the effect would undoubtedly be inferior to that of using Talisman paper and Spiritual ink, it was indeed a barely feasible solution.
