Ning Xi followed the old prince into the room, and Yan Xiao and Ye Jun also followed.

There was a pile of materials on the table of the old prince. He picked up a crimson stone at will, and wrapped it in a cluster of flames condensed by fire profound energy in the palm of his hand.

Soon the crimson stone softened and was shaped by the old prince with profound energy, and a part the size of a palm was formed in his hand.

"What this old man wants to refine is a high-grade yellow-grade war beast. Now the first step is to refine the parts needed for the war armor. You can watch it carefully."

"Yes!"

After more than an hour, 70% of the materials on the table were removed, and all of them were refined into hundreds of parts by the old prince.

"Now the old man wants to refine the appearance of the war beast, and the black iron stone needs to be handled in this way." The old man picked up a fist-sized silver stone and explained the refining method to the three people and the issues that need to be paid attention to when handling the materials.

Ning Xi stared intently at the war beast shell that the old prince used the fire of profound energy, gold and wood profound energy to build up little by little, his eyes brighter than the stars.

In the future, although her mental power and physical quality are very high, she will not have this kind of magical profound power to use. The production of mecha will only be done with the help of many advanced and sophisticated instruments.

But in this world, as long as you use profound strength, you can refine a war beast without the aid of instruments.

After the old man has finished refining the parts and shells of the war beast, he picks up the previously refined parts and starts to assemble, "The parts of the yellow-grade high-grade war beast are very complicated and complicated, and each part must be connected well, the old man will put Slow motion, look carefully."

Then the old prince carefully assembled the beast. When all the internal parts of the beast were connected, the old prince took an oval box the size of a palm, and finally placed it at the core of the beast.

As soon as the oval box is connected to other parts, the originally dead war beast seems to have life.

"Old lord, is this the source of spiritual power?" Ning Xi asked when his eyes fell on the oval box.

The old prince nodded: "This is the source of spiritual power to activate the war beast, but it is a consumable item. After it is consumed, it must be replaced with a new one, otherwise the war beast will not be able to drive."

"How is the source of spiritual power refined?" Ning Xi continued to ask seriously.

The old prince looked up at Ning Xi, "Are you interested in this?"

"Yeah!" Ning Xi had basically mastered the refining method after watching the old prince refining the beasts.

But I don't know how to refine the source of spiritual power. This thing is quite different from the energy box of the mecha.

The old man thought for a while and said, "After three days, as long as you refine the low-level parts of the yellow grade, the old man will refine the source of spiritual power for you to see."

"Okay! Thank you, Lord!" Ning Xi was overjoyed.

Immediately, the old man snorted coldly and said fiercely, "But if you can't make it, the old man won't have time to play with you."

"I will definitely not disappoint the old prince." Ning Xi said respectfully.

The old prince pouted, "I don't have much hope for you, the old man."

Ning Xi smiled, the duplicitous old man was quite cute.

It was already midnight when the old prince finished refining the beasts. Ning Xi did not go to the stone house to read the books this time, but returned to the palace.

The next day, Ning Xi was thrown by the old prince into a small cubicle to learn to make parts of war beasts by himself, and he threw her a book of yellow-grade primary war beast parts refining methods and war beast construction diagrams.