章 412: Chapter 334: The Upgrade Progress Bar Beats Again_2

Perhaps it was because the amount of raw stones absorbed was small, so the fluctuating progress was minuscule, but even so, Dong Tianyu felt a surge of elation. Before today, no matter what materials Tianyu absorbed, there was no increase in the upgrade progression of the Cave.

Now, with only a small pile of raw stones absorbed, the progress had increased, albeit very slightly, but there was indeed a change.

To confirm this fact, Zachary "borrowed" some more 'experimental samples' from the mine next to the mining pit.

After several experiments, Zachary was certain that the ores from the mining pit could indeed increase the upgrade progression of the Cave.

At this moment, with Zachary floating in mid-air through Sword Control, he gazed at the Metal Ingots left unguarded next to the smelting factory and nearly let tears of envy trickle down from the corners of his mouth.