57 Mjolnir's Rough Form!

No wonder the original furnace could only reach 1,700 degrees. Its grade was not high enough.

Now, he had enough points, and his spirit power had been upgraded a few times, meeting the furnace's upgrade requirements.

Once the furnace was upgraded, the temperature ceiling would be raised and the impurities in the molten iron would be successfully removed!

Furthermore, a Premium-grade Furnace could save spirit power. It was a well-spent 1,000 points!

Wu Mo was a little excited. He looked at the furnace surrounded by green light and was eager to try it.

Five minutes passed in the blink of an eye.

When the time was up, the green light on the surface of the furnace slowly disappeared.

Then, the appearance of the successful internal upgrade was revealed.

Wu Mo stood at the side and observed it carefully, discovering many different changes.