A little over a quarter of an hour later, they appeared in an Underground Cave about an acre in size. Large numbers of profound runes were engraved on the stone walls, emitting intense waves of Restriction fluctuations.
There were more than ten green shelves inside the cave. Each shelf was covered by a thick Azure Light Barrier, and they held Spirit Wood, ores, Demon Beast Material, Jade Slips, and other items.
Wang Xianzheng came to one of the green shelves and took out a pale-green square Token. With a gentle wave, a green light flew out and disappeared into the Azure Light Barrier. The Azure Light Barrier flickered before collapsing and vanishing.
She picked up a Cyan Jade Box and handed it to Wang Changsheng with both hands.
Wang Changsheng opened it and saw a Spirit Stone shrouded in misty water vapor, crystalline and translucent.
"Top-Grade Spirit Stone!"
A flash of surprise crossed Wang Changsheng's eyes. Even in the Mystic Sun World, Top-Grade Spirit Stones were extremely precious. They were mainly used to arrange High-Level Formations, especially Clan Protection Formations or Sect Protection Formations. Using Top-Grade Spirit Stones to arrange a Formation allowed it to operate for a longer time.
In addition, Top-Grade Spirit Stones could be used to drive Puppet Beasts, allowing them to display greater power. A Fifth Order Puppet Beast could be driven with High-Grade Spirit Stones.
Wang Changsheng had fewer than ten Top-Grade Spirit Stones in his possession. Most of them had been used in the Clan Protection Formation to maintain its operation. Aside from a few Top-Grade Spirit Stones, the rest were High-Grade Spirit Stones.
Who would be so extravagant as to use only Top-Grade Spirit Stones to arrange a Formation?
"These were dug out by our clansmen from a large Spirit Stone Mine. We