Emperor of the Universe

Prestige 2: 

Infinite Potential: While fused with yourself, each time you apply a buff to yourself and it would copy over to your other side, it instead applies to both sides twice with double the usual duration. Whenever pride barrier is applied to you, death ward is also applied. Buffs on you cannot be removed unless you choose to do so.

Fusion Power: While fused, All of your saving throw effects are considered spells, of a level of your choosing. You are always considered fused with yourself, though a temporary fusion is still possible. You have full control over the body and mind fused together, if you so wish. If you cast "ice knife" on a creature you are in melee with, instead of a saving throw, you may make an unarmed attack roll, using your spell attack modifier, with the same damage it would normally deal in magical or mundane bludgeoning damage.

Prestige 4: 

Soul Punisher: if a creature attempts to drain your power, be it game statistics, spell slots, copy abilities, soul destruction or stealing, or other forms of emulation such as clones, they are repented immediately by the weight of your power. They instead lose that many stats, slots, a random copied ability if they have any, and any clones immediately are immolated, exploding into stardust as though they had been killed by stardust breaker, including simulacrums. 

Stardust Breaker: As an action, you may condense starlight into your hand, firing it out at a single creature you can see, deciding if this attack is a god-breaker or a mortal-breaker. The creature must succeed on a Charisma saving throw against your spell save DC. If it was a god-breaker, the effect occurs on a success. If it was a mortal-breaker, it occurs on a failure. Otherwise nothing happens. The target's very body is filled with star-like energy, dealing half of their max hit points in force damage (max 1000 damage), and transporting them to a demiplane with certain conditions based on their alignment if they are reduced to zero. Before any awakening or death ward like abilities activate, they are cast away:

Lawful: the demiplane is a maze, as if you had cast maze

Neutral: A flat steady ground

Chaotic: A forever churning sea(Strength checks against 3d6 bludgeoning at start of turn)

Good: Target is healed for 25% of their maximum health points

Neutral: Target has advantage on any concentration but disadvantage to any wisdom checks(not saves or attacks)

Evil: Target creatures is permanently banished from the material plane

Creatures who die in this demiplane, or as a result of the stardust breaker are completely destroyed, and only stardust remains.

Prestige 6: 

Unique Biology: Whenever you are bloodied, you regain 10 levels of spell slots. If you are healed from zero hit points, your spells deal one additional die of damage on your next turn. If an effect would reduce your game statistics, they rise by that amount, instead. Your being in space does not impact your physiology whatsoever. As an action, you may cast the teleport spell, without expending a spell slot.

Maximum Power: Whenever you expend a spell slot, you may treat it as though it was expended for your pride barrier as well. Your bardic inspiration can stack up to 4 times on enemies. Creatures may be immune or resistant to your damage, but all other sources of damage reduction, such as "instead" or "unaffected by" utterly fail against your power.

Prestige 8: 

Supernova: Your Devastating power ability may also be used as a massive ball of energy not unlike the sun itself; growing in radius in the same strides as the beam would in length and width. In either form, the amount of range and width it has when growing is 10x larger. the attack also deals 100 times more damage to objects. Any object damaged by this attack, or any creature reduced to zero by it are destroyed without anything more than some stardust in their wake, allowing the attack to continue to move through. 

Emperor: You command over an army you have dubbed the pride troopers. While these troops are under your command, they all gain the power of The Boon of the Siege master while in Varanthia or against varanthians. For every significant conquest of a region or world (DM's choice what qualifies) the troops grow in number and strength, using stat blocks appropriate to the region. Special creatures may be appointed by you as "commanders" and given a small part of your power; they can fuse with other commanders, following the rules of the Potara Earrings item.