(A/N: Spoilers ahead. Tread carefully.)
DIVINITY:
This is a state that can only be reached when an individual completes three requirements:
Limit Breaking, where the combatant has to reach the summit of the power system established in the world they reside.
Mortal Binding, where the combatant has to spread their essence through a large number of living, Blessed beings.
Ember Tasting, where the combatant has to get a feel for the Divine by interacting with the Blessings stowed within the Blessed living beings they have bound themselves to through Mortal Binding.
Divinity is a state of existence that transcends the mortal boundary. Mortals are beings with a mortal body and mortal soul. When they die, their soul either slips out of their flesh and is destroyed, or it goes to prepared havens governed by the Deities who created the individual.
To be sure, Deities are Divines, as well, but of a higher league. Think of it as a tall, upright pillar with its base being where the common Divine beings (or Divines) place in strength and quality, while the middle is where the ordinary Deities rank.
Now, all Divine entities have a soul and body, but unlike mortals, their soul and body share similar properties.
A mortal soul is sophisticated. In the story of Bro I'm Not An Undead, a soul while incapable of existing without a body, is said to carry all the information about the body, including all its potential and the will of the individual. The mortal body carries skills its owner learns and can potentially learn the soul's information but slowly and over time. In short, it is a less sophisticated construct on top of being material.
Divinity breaks this standard. A Divine being's soul inherits the body's ability to interact with physical matter while maintaining a firm shape that can exist on its own. On the other hand, a Divine's body acquires the soul's sophistication – the ability to hold potential and learn and turn malleable and ethereal when needed.
What enables the soul and body of a Divine to exist and move separately (as two conscious beings) is a third state of existence that they acquire upon ascending to Divinity: the Broader Existence.
The Broader Existence is the space between a Divine's body and soul. It is not a space that can be identified or perfectly noted by outsiders on a specific point as it can exist anywhere and everywhere. Only its owner is able to interact with it freely and with enough mastery, they can use it for other unorthodox purposes.
Normally, it is impossible to attack another Divine being's Broader Existence, and without harming it, it is impossible to kill a Divine being.
In their growth, Divines seek to enhance the quality of their Broader Existence. The greater its quality, the greater the quality of their body, soul, and techniques (Andori). More importantly, the greater the Broader Existence's quality, the wider the range a Divine being can operate with their body in another place, and their soul in another; it is a very valuable ability.
However, it is known that the best way to kill a Divine is to attack while they have their body and soul separated. While they are whole, Divines are practically invincible in most cases, but when split, attacking either their body or soul with a strong enough attack will allow damage to reach their Broader Existence.
To remedy this great flaw, there are several options that Divines can use, and all of them involve the Common Reality Leagues.