Kesier Rune

Kesier runes are currently the safest and fastest method that humans have developed for training the mental sphere.

The automaton, "Thirty-Seven", describes them as "a pure expression of power".

History
According to William, the Kesier species were a group of magical beasts with a powerful mental energy enough to squeeze an adult man into a ball of flesh with a single thought. They looked like big monkeys and each had a different number of runes embodied on their back; the more the runes they had, the more powerful their mental energy was. It was also later found that the runes "hold" the power of the Apes, as when a R7 ape lost it's 7th rune due to it being ripped off, the ape could no longer utilize it's full R7 power nor grow the rune back.

When humans discovered that these runes could be used to empower their mental energy, a big extermination of the Kesier species to obtain the runes began. The runes are all that are left of the species.

Later on, human experts that met certain conditions were able to copy the Kesier runes onto sheets to increase the availability for their organizations.

Classification
The method to train the mental energy was a result of years of experimentation on the Kesier runes. Humans have classified the runes into 3 sets with each set having 3 runes for a total of 9 runes:


 * The first set covers the "Human ranks" having runes for rank 1, 2, and 3.
 * The second set covers the "Heroic ranks" having runes for rank 4, 5, and 6.
 * The third set covers the "Divine ranks" having runes for rank 7, 8, and 9.

Functionality/How it Works
The training with the Kesier rune does not depend on the density of 'Breath' rather, looking at the rune expends mental energy. It does this by applying immense pressure from inside the sea of consciousness, making waves continuously crash on the mental sphere, enlarging it.

It is advisable to stop once the mental energy has been depleted to a certain level or else further training will cause the mental sphere to shatter.

Use
After a period of training, a faint, ethereal copy of the Kesier rune will appear in the space of the sea of consciousness. This copy will appear more distinct/clear as training continues. The training for a particular rank of mental sphere will be complete when the image of the Kesier rune forms completely. This will trigger the advancement of the mental sphere.

A Kesier rune will allow one to reach its equivalent rank after which, they will need a rune of the next level to push their minds to the next level.


 * For example, the First Kesier rune will get a cultivator to the 1st rank of their mental sphere. They will then need the Second Kesier rune to expand their rank 1 mind to the limit and to break into rank 2 etc.

Apart from enlarging the mental sphere, a cultivator can control the Kesier rune to produce a continuous humming which is a form of attack in certain battles within the mental sphere.