A Universe has 6 stages:
The first stage is birth. A universe will be birthed when another universe at the Elder stage breaks off parts of it's self that are close to death. Breaking off a piece of a universe requires lots of energy and that energy is stored in those pieces and attracts other broken off pieces of other elder universe's pieces until it forms an Universe Seed which is about the size of a grape. The energy in the Universe Seed is very violent and eventually causes the shell of the seed to rupture causeing the birth of a new universe.
After birth comes infancey, which is when an Universe God is assigned by the system created by the Multi-Verse's caretaker. This stage is when the first Laws and Things are born/created in the universe. This is also the stage were the universe grows the second quickest (there is only 1 stage which grows faster that this one). This faze is relatively unstable as alot of growth is happening.
After infancey comes the "Maturing" stage which is when the universe and it's inhabitants will be able to settle don't and get alot of work done. Most wars that happened in the infancey stage due to a wide variety of reasons die down and technology, magic, and exploring really happen.
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After the "Maturing" stage comes the "Extreme Growth" stage which is when the universe is expanding quickly and more Laws are added and some are changed and removed (depends of the UG). Dimensions and sub dimensions come into existance. This stage is very dangerous as spacial tears will happen because of the new dimensions and sub dimensions. More godly domains are added to cope with the new Laws. More wars and calamities happen and many demi-gods rise to godhood. Many creatures go extinct and new ones evolve. Many new mid-gods and high gods rise, but many fall.
After the "Extreme Growth" stage is the Adult stage which is the longest stage. In this stage everything settles down the tears in space are mended, the laws become almost entirely fixed. Resources become abundant that civilizatoin don't need to fight and reseach and study flouish demi-gods will be less common. Less Mid-gods and high gods will be born.many gods get to relax.
The final Stage is Elder stage which is when the universe will slowly shrink into a very easy to maintain size. Universe God who get to this stage without their Universe being destroyed by secret dangers that will be revieled in later are amazingly strong and there universes will be nearly indestructable. At this point The UG will have the option to become a Multi-Verse Regional God which overlooks regions of the Multi-Verse and ensures that dangers are destroyed and the UG's are following the MULC (Multi-Universal Laws of Conduct) or to retire and overlook his Universe till he discided to become a Multi-Verse Regional God. When a UG becomes a MVRG they pick a high god from there universe to become the acting UG.