Bodies and constitutions are not graded but based on how the user utilizes the said body/constitution.
Bodies or Physiciques are abilities the user is bestowed by the system when certain conditions are met or awoken through bloodline awakening from their ancestors.
Say, if a person awakens their Phoenix bloodline, they may have a very small chance to unlock a fire-type physique or some constitution like the Ever Living constitution.
These things are said to be random and can't be unlocked by force. In some instances, a person may notice they never get cold or a person may breathe underwater far longer than anyone at a young age.
These are signs that the constitution may awaken. Most times they never do because the system does not deem the person worthy enough of bestowing said constitution.
There are all kinds of these bodies and constitutions but some have never been bestowed.
Some are born naturally with their bodies.
Only one person of any race can awaken a body/constitution at a time. For example, if an Elf awakens a magic body, no one can have that body until said person is dead.
(Body and soul. Remnant souls don't count as being alive. It's just their wills. They have to be in control of their souls.
Saint tier and above beings can reconstruct their bodies with their souls but it will take astronomically long to build it. Especially if it's a Divine ranked body and above.)
F*ck it. I'll just give grades to Bodies/Physiques and constitutions from lowest to highest in the room. (I still want my money Travis 😐)
Human/Mortal Body
Ascended Body
Heavenly Body
Divine Body
Primordial/Origin Body (Highest-tiered thing there is in the known universe.)
(Primordial Bodies are separate from the other bodies that can manifest a bit more frequently. The higher the rank of the body, the rarer it gets. Takes about 10 million years for a divine being to be born.
What about Primordial? Don't even think about it. It's incalculable when those Bodies would appear. But, when one of these bodies does appear, the balance of worlds/realms/galaxies will change.
Only five have appeared since Aetherization. More on that later in the story. What? Do you want to know all the details? Guess what, poser? Too bad. Read 😈)