Lu Ye had only acted on a whim, thinking of practicing on the Demonic Wolf. He had expected to spend some effort persuading it, but never imagined it would be so cooperative.
However, Tattoo Patterns required corresponding materials, and different Tattoo Patterns required entirely different materials. There were extremely strict rules governing this.
The materials were generally mixtures of beast blood and medicinal liquid, which Tattoo Pattern Masters had to blend themselves in different proportions. Different Tattoo Pattern Masters used different materials and ratios, and every one of them had their own exclusive secret formula.
The secret formulas for the various Tattoo Patterns in Lu Ye's possession naturally came from Madam Yun. They could be said to be exceptionally fine formulas.
However, although he had previously collected some beast blood from Thunder Shadow and the Poisonous Python, neither was suitable for a Sharpness Spirit Pattern. Going out to buy or collect materials now was clearly not worthwhile.
After thinking it over, Lu Ye had an idea.
Since it was inconvenient to go out and buy or gather them, he could simply summon a Heaven's Mystery Pillar and use it to enter the Heaven's Mystery Vault to make his purchases.
He had already planned to summon a Heaven's Mystery Pillar before, but not much time had passed, and he had yet to put the plan into action.
Summoning a Heaven's Mystery Pillar was certainly expensive, but at the very least, if they encountered an utterly irresistible crisis, everyone in the Spirit Land could use the Heaven's Mystery Pillar to flee back to the Nine Provinces. It was a life-saving thing, so it was worth it no matter how costly it was.
Moreover, the Spirit Land was located deep within Mount Taimang, making travel to and from the outside world inconvenient. If