Chapter 581: Preparations Before the Upgrade_2

Thinking about this, Leo Ray couldn't help but rub his hands excitedly.

Then, he pondered to himself: "These three Miracle Buildings are all of great significance; this undoubtedly means that my overall strength in various aspects will rise to a new level!"

However, just as Leo Ray was about to collect resources and start upgrading the buildings, he realized a key issue.

"Hold on, the current stockpile of stone in the territory has already run low, which is not enough to supply the upgrades for both Miracle Buildings that require stone. It seems that I need to acquire a lot of stone first."

After making a decision, Leo Ray suppressed his excitement and opened up the long-lost Trading Center.

After checking the data, Leo Ray was surprised to notice that

the current price for one new Tier 1 Iron Sword has increased from 2,000 to 2,500 units of stone, and it even continues to rise.

Logically, as time went on,