Every century, a lesser nether lifeform can be naturally born in the dimension. If a being who has higher nether energy reserves is born in the dimension it will increase the chances of more talented and stronger nether lifeforms being born.
When a nether lifeform is born, its rank will only be at the [Lesser] stage, which is why its called a Lesser Nether Lifeform. If a Lesser Nether lifeform can absorb enough nether energy in its body whether through trying to absorb the nether energy of the dimension(this is usually impossible) or murdering its fellow Lesser Nether lifeforms it can eventually evolve into a General ranked nether lifeform.
Lesser Nether lifeforms usually try to flock to higher ranked beings of their race for survival and the chance to evolve themselves. Once a Lesser Nether lifeform has evolved to a General Nether Lifeform, it gains the ability to conciously manipulate the nether energy present within its body to perform special attacks and to also increase its physical strength through using nether energy.
They gain horns and special markings on their body which shows their evolution to the general rank. If a general ranked nether lifeform gains a name from a higher ranked nether lifeform it increases their power drastically and also their potential to gain more power.
If a Lower ranked nether lifeform tries to name any nether lifeform of higher rank, not only will it die but all of its powers will go to the one it tried to name.
If any nether lifeform gets named by Adrian himself, not only will they get much more powerful but will also directly evolve to the next stage.
After the General rank is the Elite rank, the only known elite ranked nether lifeform was Azazel before he gained a name. After he gained the name he evolved into a Lord ranked nether lifeform which is second only to Adrian himself. The Lord rank is the final stage for a nether lifeform.
At the Elite rank, a nether lifeform gains two special abilities unique to itself. Adrian himself can directly create Elite ranked nether lifeforms though doing this makes him permanently lose some power.