Cultivation/Heaven Realm

Refine Elemental Qi
Each Land had their own Upgrade Fragments being born from nature. Fire Land had Fire Element Upgrade Fragments while Metal Land had Metal Element Upgrade Fragments. Same applied to other Lands. Upgrade Fragments are scarce and appear in nature out of thin air. Because there is only one form of Qi in each Land, it's so concentrated that it sometimes forms into those Upgrade Fragments. They also always try to escape whenever you get too close to them.

There is a need a few of them to improve the quality of your Qi. The better the Qi, the more Upgrade Fragments is needed. The number of Upgrade Fragments required is increasing the more you refine. First Refining needs ten fragments, Second Refining almost fifty while the third a hundred. Everyone is stuck at that point as the next one requires a whooping five hundred fragments.

"There was one Expert called Refining Master who devoted his life to determine the maximum number of Qi Refining a Cultivator can perform. Eventually, he stopped at the Ninth Refining and created a universal guide that every cultivator is using to this day."

Rank in Elemental Qi
After refining four times, you can finally materialize your Qi, this stage called Qi Materialization."At that point, your Qi is so dense it can become your weapon, almost acting like a physical body.

The Seventh Refining, Qi Incarnation, is even more powerful, allowing you to temporarily slip your own soul into the body made from Qi. Those bodies are commonly known as Avatars.

Cultivation
The Dantian is split into nine spaces and each space can be only filled with one Element. The person with more Elements will naturally have more Qi than the Cultivator who advances in stages using only one. This is why it's advised to master all nine Elements before one tries to reach the tenth stage called God Stage, which requires to merge the Dantian and the Soul.Once you merge your Soul with your Dantian, you can no longer cultivate using other Elements.

After you finally mastered all nine Elements and filled your Dantian with Qi to the brim, you are required to merge your Dantian with your Soul. Once you are successful, you will finally enter the God Stage.

The God Stage opens another chapter where one cultivates by tempering their Soul. It is a very delicate process that requires to insert Qi into the Soul and slowly expand its capacity. Souls are special and can stretch to extremely big sizes. You cannot speed up this process and it's actually the most important moment because it determines the Soul's capacity.

Before you can become a full-fledged God Stage Cultivator, you need to pass through two more unofficial stages.
 * After merging your Soul, you enter into the Pseudo-God Stage. At that moment, your Soul has the size of your body, fitting perfectly.
 * Once you start expanding it and you start feeling discomfort as if your Soul doesn't fit anymore, it is a sign you entered Semi-God Stage.

Only when you reach the limit of your Soul and cannot expand it any more will others see you as a full God Stage Cultivator.

When the Soul expanded to its limits and to achieve Immortal Stage, it's only needed to do one thing. Create an Elemental Core using all the Qi gathered in the Soul. If a cultivator only mastered one Element before merging his Soul, he can only create a single Elemental Core. The more Elements he Mastered, the harder it is to create one.

When a cultivator balance nine elements, he have the Legendary Gold Core.