Monkey King was cultivating.
The four old monkeys led the demons to guard him. No one dared to disturb him.
To Monkey King, cultivation was as important as the experiments on Mount Huaguo. He couldn't slack off.
Ever since he attained the Great Dao, Monkey King knew that he was very powerful. However, no one could force him to use his full strength, so he couldn't be sure how strong he was.
At the very least, he felt that he shouldn't be weaker than the Monkey King before he became the Horse Protector. Of course, without eating the immortal pills and immortal peaches, he definitely couldn't compare to the Monkey King who wreaked havoc in the Heavenly Palace.
However, he also understood that he had to walk the right path. Unless he had no other choice, he probably wouldn't secretly eat the immortal pills and immortal peaches.
In order to make up for the gap caused by the lack of them, he had to cultivate very hard.
Fortunately, he spent more time cultivating than writing in the Heavenly Book.
After a day of cultivation, Monkey King opened his eyes. Only then did the four old monkeys walk over boldly.
"Your Majesty, the first spiritual item has been created."
Their report made Monkey King's eyes light up.
In just two months, the demons had some results.
"Get them to bring it over for me to take a look."
Monkey King got the four old monkeys to call the spiritual item manufacturing team to the Water Curtain Cave.
"So it's you guys."
Monkey King recognized the leading demon — it was the 10,000-year-old fox king who had seen through his avatar back then.
Beside the 10,000-year-old fox king was Lao Dao, who had handed the banana fan to Monkey King.
Behind the two of them were dozens of demons. Monkey King noticed Rakshasa. After more than ten years, she was already slender and elegant. She was different from when she was young. At this moment, she appeared especially quiet.
"She has quite a good upbringing."
Monkey King thought. He could no longer sense that mischievous aura from Rakshasa.
"What did you guys create?"
Monkey King said, "Bring it over for me to take a look."
The 10,000-year-old fox king immediately handed over a broom.
Monkey King took the broom and looked at it. The shape of the broom looked like a fox's tail. There were many mysterious runes engraved on it. Monkey King reached out to touch the runes and felt a faint spiritual qi flowing within.
"I see."
Goku understood as soon as he touched it.
These demons had already discovered the key technology to create feys.
He threw the broom to the ground. When the broom touched the floor, it suddenly stood up and began to swing left and right, sweeping the floor.
The Water Curtain Cave's demon monarchs exclaimed.
"Is this the broom from the Heavenly Palace?
How can it move? "
"The brooms in the Heavenly Palace can move because they are sentient, but this broom obviously has no sentience."
The Demon Kings discussed among themselves.
Monkey King noticed the problem with just a glance.
He pointed his finger, and a sand dune suddenly appeared on the ground. He swept the broom on the sand dune, and immediately, the sand flew everywhere.
"This broom can't sweep the floor yet."
Monkey King waved his hand to disperse the sand and said, "It only knows how to move."
The four old monkeys were instantly enraged. "How dare you lie to our king!"
The fox king hurriedly bowed. "We don't dare. This broom isn't complete yet. We still lack a dustpan."
"That's still a lie!"
The old monkeys were enraged.
Monkey King raised his hand, signaling them to stop questioning.
"Is the power of the broom derived from the essence of the sun and moon?"
Monkey King asked.
"Yes."
Lao Dao hurriedly replied.
They observed Monkey King's medicinal herbs and after two months of research, they created a rune that could absorb the essence of the sun and moon and carved it on the broom.
As long as the broom absorbed the essence of the sun and moon for a day, it would be able to sweep for an hour.
"It's only been an hour!"
The old monkeys became even angrier.
"Very good."
Monkey King was very happy. Although the broom was incomplete, the rune on it was very useful.
This rune was like a solar cell. It was more meaningful than the broom itself.
"The rune on the broom is very important. We should focus on researching it."
Monkey King glanced at the Water Curtain Cave and said to the other Demon Kings, "If you guys are free, we can go and explore it together."
"Our king!" The Demon Kings were shocked. "Is it really that valuable?"
"Of course it is."
Monkey King smiled. "This rune can convert the essence of the sun and moon into spirit qi. It can be used as the core of many spiritual objects."
He suddenly stretched out his hand. A hanging lantern floated over.
"Watch carefully."
Monkey King's fingertip emitted a light as he drew the rune on the lantern.
After he finished drawing, a celestial light shone above Monkey King's head. A sun could be faintly seen within the celestial light.
Everyone was dumbfounded by what they saw.
Monkey King activated his technique again. The sun turned into the essence of the sun and moon. It was projected onto the lantern and seeped into the rune.
In the blink of an eye, the lantern had absorbed enough spirit qi.
Monkey King released his hand. The lantern floated up and shone brightly in the air.
"This lantern has absorbed the essence of the sun and moon. It can illuminate the darkness."
Monkey King said, "Isn't it more magical than the lanterns of humans?"
Everyone was stunned. They looked at the lantern in a daze.
After hearing Monkey King's words, they understood that the rune had limitless uses.
"You guys have done well. I look forward to you guys improving the rune's effectiveness."
Sun Wukong rewarded the 10,000-year-old fox king and the others before letting them leave.
After walking out of the Water Curtain Cave, Lao Dao's back was covered in cold sweat.
"Fox King, did you see the rune His Majesty drew?"
Lao Dao asked.
Fox King nodded. "He improved our rune."
The moment he said that, the rest of the demons were shocked.
"Improved rune?"
The jade-faced fox asked in disbelief, "Could it be that what he drew just now wasn't our rune?"
"No." Fox King shook his head. "His Majesty's rune is more efficient than ours."
Lao Dao nodded. "He didn't draw it fast. It seems like he wanted us to see it on purpose."
The two elders understood that Goku wanted them to continue to improve the rune's effectiveness based on the lantern's rune.
"I still need some time to understand His Majesty's rune."
Fox King shook his head and sighed. "We are really displaying our slight skills in front of an expert this time!"
Lao Dao smiled bitterly. "That's right!"
They had wanted to come earlier to claim credit, but they didn't expect Goku to understand the results of their two months of research at a glance.
Not only did he understand it, but he also improved it.
The profoundness of his Dao was beyond imagination.
"Maybe …" Lao Dao could not help but guess. "This rune was in His Majesty's calculations from the beginning."
After hearing this, the Demon Kings felt that their King was unfathomable.
Especially Rakshasa's Daughter. After more than ten years of learning, she understood the importance of knowledge and technology to the Demon Kings.
But today, she truly experienced the overwhelming intelligence of Monkey King.
The other Demon Sages were like a piece of cloth in front of him.
"I can't fall behind."
Rakshasa's Daughter thought to herself. She must become an extremely intelligent person.