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Chapter 237: Promotion to Fourth Stage Array Master, Grandmaster Level Skill_4

"Oh, I wonder how much resources and how many Spirit Stones would be needed?"

Shen Biqian and the others curiously asked.

"Well, the main materials for constructing a fourth stage superior formation Xuan Yin Heavy Water are Xuan Yin Crystals and Heavy Water Crystals."

"But both of these materials are fourth stage materials, they're quite expensive."

"Although they are abundant, they are not considered rare treasures."

"However, one may have to exhaust all of his resources, just to purchase them."

Zhou Sui gave a rough estimate.

Upon hearing this, Shen Biqian and the others lightly laughed, their expressions relaxing a great deal.

"So that's all it costs, you gave me a scare just now, I was wondering how much it would cost."

"With such a small amount, our Immortal Mist City can probably earn it back within five years."

"Dear, you may not know since you've been closed off practicing for many years, just how lucrative our Immortal Mist City has become."