Tier8 was the pinnacle of power that one could reach within the controlled universe.
Hailed as 'monarch's' , the few individuals who were able to enter this realm of power ruled the universe as absolute beings of authority.
Just like tier4 before where one went from being a normal mortal to being a demi-god type superhuman and tier6 where one went from being a superhuman to a true god, tier8 was also a major realm and the gap in strength between tier7 and tier8 was immense.
The tier8 promotion test involved mastering the universal laws of creation and destruction as well as liquifying the soul.
In a way it was the penultimate form before core solidification that was needed to become a celestial, but in another way it was improving the quality of one's soul and binding it more strongly to one's body to greatly enhance their own physical abilities.
