LitRPG: Unequal Exchange

*He was not a person of this world. 
He came from the 21st century and had transmigrated to this foreign world for five days.
According to what he knew, this was a world that respected martial arts.
The power was divided into one to nine stars and nine major realms.
And today, is the day he would take part in 1-star Cultivator's test.
But he had been toldhe had no talent and could not cultivate at all.
Why he still trying to take the test?
.....
"System binding, 10%... 50%... 90%... Binding successful."
As a reward for transmigrators, the system had finally activated.
This was a simple trading system.
As long as he came into contact with something, he could carry out the transaction.
Touching the water in a bathhouse, It could also be exchanged for a Water element Heaven Rank skill, and now it could be used to immediately cultivate his to the Peak of Perfection!
"Ding! Water element Heaven Rank skill, Water Condensation skill has already reached the Peak of Perfection. Using this skill can easily suppress a two-star expert..."
...
When a little snake in exchange for the ancient flood dragon bloodline instantly possesses a powerful cultivation talent...
One bottle of poison wine exchanged for a Ten Thousand Year Replenishing Wine, instantly rewarded ten years of cultivation, all attributes + 10.
He knows he had the power to crushing everything, and walked onto the path of the pinnacle!