Tian Xuan and Li Yiyuan lacked the common sense of the world so Wu Xian had to try his best to explain everything to them.
Only then that Tian Xuan found out that even tier-5 kingdom royalty has only few ten middle-tier spiritual stones and regarded the high-tier spiritual stone as treasure. While 7th tier kingdom would only see the shadow of middle tier stone and have few low-tiers spiritual stones given by the Conferred Empire as an annual gift.
According to Wu Xian, a gold coin in his hometown is enough to fill him and his two best friend stomach eating a roasted chicken every day throughout the year.
Only rich clan gave their main branch gold coins to use and only the prominent figure is able to flaunt their richness using the gold coin. Even the one that killed him, the legitimate fourth miss of Shao Jun only gets around five hundred gold coins every year because she is a genius that has the potential to inherit the position leader of the Shao Clan.
That's why when Tian Xuan showed the middle tier spiritual stone to them to aid them in their cultivation, Wu Xian eyes almost leave its socket.
Without using the spiritual stone and just relying on the spiritual energy around them is not quite enough for them to cultivate an incredible speed. Plus, the spiritual stone doesn't have many impurities like the surrounding spiritual energy so the three were able to breakthrough their realm without much difficulty.
If there is too much impurity, the meridian will be blocked and hinder further cultivation but Tian Xuan has a superior zhenqi that can clear up the meridian. As long as there is him around, the two don't have to worry a thing about cultivating.
But for Tian Xuan, he thinks that his cultivation speed is slow.
Although Tian Xuan thought like that, Wu Xian who experienced cultivating with simple cultivation technique provided by the academy on the top of the mountain behind the school, he thinks differently.
Just the cultivation technique provided by Tian Xuan has improved the speed by so much and the spiritual energy around them in the forest is way abundant than the top of the mountain he used to cultivate.
Less than a day, he was able to breakthrough from 1-dan Ki Refining Fighter (Qi Condensation) stage to 2-Dan Foundation Establishment without even using the middle tier spiritual stone.
Then, he used the stone and immediately breakthrough from 2-dan to 5-Dan Cauldron Expanse.
Since it wasn't too good to hasten the cultivation speed, he made sure to properly establish his foundation before attempting another breakthrough.
Tian Xuan doesn't care about the common sense of this world and used the spiritual stones without cares. He also doesn't have to properly establish his foundation because Tian Qiu is there to take care of every problem in his body so he hastened his cultivation speed.
If cultivation quest is not enough to provide him the spiritual stone, he will do the side quest that grants spiritual stone but not exp scroll.
The side quest that he accepted required him to go kill demon beasts of above rank than him and the universal system will provide him 10 middle-tier spiritual stone for every demon beast above his rank that he killed.
If he kills those lower rank than him, he will be provided in a fair transaction such as a rank lower than him, he will be reward 1 middle tier spiritual stone. Two ranks lower than him, he will be rewarded 50 lower tier spiritual stones and so on.
He also could exchange the demon beast core to gold coins but because he doesn't need money, he kept them in his inventory and stocked them up in case of emergency.
As the demon beast cultivation rank is higher than him, the reward naturally increases.
If not because Tian Qiu warned him about the Demon Beast Emperor that is guarding the region they are staying at, Tian Xuan would have obliterated every demon beasts that he could find.
Thus, he could only moderately kill the beast for spiritual stone.
Every part of their body, even the pelt is valuable so Tian Xuan kept them since they are used to strengthen formation, craft armor, smith weapon and make the elixir.
As for the meat, it is nutritious for the martial cultivator to consume so Tian Xuan let Wu Xian cook them while he provided the meat and such.
He is a plant type spirit so his meal is the sunlight, fresh air, and water. He would have remained satisfied with just that if not because he tasted the demonic beast meat 'once'. After he tasted the meat, he couldn't be satisfied with just the sunlight, fresh air and water.
Of course, there are the grade in his meal such as spiritual lake and Divine Sunlight will be very nutritious for him but it is too wasteful if Tian Xuan bought it in the system shop.
A drop of Spiritual Lake water cost one lower tier spiritual stone. A full lake cost seven hundred middle tier spiritual stone.
He rather gives the stone to a dog than buying the wasteful thing.
Tian Qiu tried to coax him to buy once because it will aid the cultivation in a long phase but Tian Xuan refuted by saying, "If I try it once, I will want to try it another time. So, before there is a second time, I will do my best to prevent it from happening even once!"
And thus, despite Tian Qiu's persuasion, Tian Xuan didn't buy any.
Instead, he bought many plant spirit skill manuals.
Some of them allowed him to distinguish other types of the plant such as medicinal herbs, poison plant, also plant spirit and some of them allowed him to cultivate his own type of plant and aid the other plants in their cultivation.
Any plant that is above 10,000 years old has the ability to trick the enemy into thinking they are other plants or has other mechanism or skill as protection but those plants cannot fool him. They even have to present themselves in their best condition toward Tian Xuan that is their lord.
Aside from cultivating, Tian Xuan also teaches other occupation arts from qin qi shu hua [Zither, chess, literature, painting] as part of their entertainment.
Just by touching the manual that he bought from the system, Tian Xuan can master the technique taught in the manual easily. Then, he can impart his knowledge by taking out his spiritual energy filled with the wisdom to the people he wants them to learn the knowledge or just teach them manually.
Not everyone has the system to help them understood the information in the manual. Even if people can memorize the content in the manual, not everyone can understand the content so Tian Xuan taught the two before him through orally and action.
The scene of short boy teaching the matured men is comical but both Wu Xian and Li Yiyuan learned seriously.
Even when the painting is terrible as if Tian Xuan is the reincarnation of Picasso, the two don't dare to laugh at him.
However, Tian Xuan laughed at Wu Xian without cares when he heard the man sang.
"The bridge under the moonlight,
the girl waited for the scholar.
Letter the adoration,
the scholar love non but a woman. " Wu Xian emotionally sang a verse but his voice was as if crows are croaking.
"Buhahahaha, hahahahahahah. Stop it. It's hurt. My stomach going to explode. Ahahahaha."
The silver-haired boy rolled on the grass while kicking the air and holding his belly while crying out of laughter. Even Li Yiyuan at the side is glancing behind his back while his whole body trembling as he tried his best to not laugh.