Nathan entered the dimensional space and headed towards the fields where the spirits are located.
There, he saw the field continuously growing with different kinds of crops.
From strawberry to wheat, you can see it there.
All of these are plants that were grown using seeds with common rating but after they are harvested, they will turn into uncommon thanks to the soil of the dimensional space which makes anything that is planted on it to grow into higher quality.
Let's say that Nathan plants an uncommon rating seed, with the powers of the soil, it can then turn into a great rating when it matures.
The item ratings go from, common, uncommon, rare, unique, epic, and legendary.
At least, this is what's known to Nathan through the appraisal.
Anyway, Nathan was seen by the spirits as he headed towards the fields and they started to gather towards him.
He greeted the spirits one by one before telling them to go back to their own work and walked towards the edge of an empty field.