Following the Demon Venerable's suggestion, Li Qing smoothly stored all the town stones within the Grotto-Heaven World. Every single one had been refined by immortals of the upper realm and was undoubtedly a true immortal treasure.
However, this did not mean he trusted the Demon Venerable. Li Qing remained vigilant at all times, guarding against whatever ulterior scheme the other party might be plotting.
"How many town stones would it take to form a complete Heaven-reaching Killing Formation?" Li Qing casually asked.
If he could obtain enough town stones in the Lingxiao Immortal Domain, then perhaps his Immortal Slaying Formation Diagram might undergo another advancement.
But after hearing Xuantian Immortal Hall's reply, he dismissed the thought.
"As far as I know, a complete Heaven-reaching Killing Formation requires one hundred thousand town stones. Every town stone takes a True Immortal thousands upon thousands of years to refine."
"And the town stones you see now were likely privately stashed away by some Jade Void Palace disciple. There should not be many town stones left in today's Lingxiao Immortal Domain."
One hundred thousand! A single town stone required a True Immortal nearly ten thousand years of refinement!
Even Li Qing could not help twitching the corner of his mouth at that outrageous number. Perhaps only mighty powers above the immortal world could refine such things.
Not long after putting away the town stones, Li Qing felt something stir. He took out a crimson gold bamboo slip from his person.
The bamboo slip radiated scorching heat, as though it had received some sort of summons.
"Those old fellows of the Heavenly Demon Race move quickly indeed. We have only just entered the Lingxiao Immortal Domain, and they are already planning to open that Immortal Estate." Li Qing stroked the golden bamboo slip with his