This might be updated later on.

--- Celestial Power

The former power system from Regulus' world. The imbuing of constellations star by star into the body allows for an enhanced body.

The levels of power are dependent on the number of stars in the constellation, Leo (Regulus' constellation) has 9 hence 9 levels. The number of stars doesn't directly translate to power, different constellations are usually equal despite different stars.

This varies however from user to user as higher talent results in higher definition constellation and hence more power. Regulus at 9 stars is very different to an ordinary person at 9.

--- Celestial Martial Arts

Each constellation from Regulus' former world comes with a corresponding martial art with levels (and moves) related to the number of stars. These martial arts passed down by the celestials are extremely profound and have visual effects, surpassing all martial arts in Regulus' new world. 

---Above the Sequence

A mysterious level of legend that Regulus could only reach through the sacrifice of everything. The way of attaining this level was lost for thousands of years.

---Card Magic and Aura

The power system in the world Regulus was reborn in, Immisso.

Royal Face Cards worked through progressively to gain power, unlike Celestial energy which powers the body, this system targets the soul.

-Details

Higher details on these cards mean higher talent and greater power. Divided into:

Dim - Barely Visible card.

Bland - A basic playing card that the majority hold.

Detailed - More talented than usual, seen as irregular in society.

Lifelike - Extremely detailed card with added parts.

Gold Encrusted - Genius among geniuses hold these cards.

Legendary Unique Card - Unique Cards that shake the world whenever they appear.

-Royal Faces

Ace Card - The foundation of the power system, a usual requirement to enter Karta Academy. The most crucial part of the power system allows the user to tell their potential dependant on the detail of the card.

Jack Card - A respected warrior who could have a medium-level position in the army, also a level that even the most untalented can almost approach if given enough resources.

Prince or Princess Card - A level on the cusp of the elites, most talents will reach this point. The only card which has two options of evolution depending on gender.

Queen Card - Elites of society equivalent to Regulus in his last life with 9 constellation celestial powers at the peak of the card.

King Card - Trump cards of respective nations, a walking calamity who even Kings of nations would bow to.

Emperor Card - The Strongest.

Joker Card - A mysterious card, the joker of life and death.

-Suits

In the world of Immisso, the power systems of Card Aura and Magic are integrated together. Suits show the weighting of the user's talent. No one has evenly distributed talent and no one has great talent in both.

Spades = Highly weighted aura user

Clubs = Weighted Aura user can utilise magic

Diamonds = Weighted Mage user can utilise aura

Hearts = Highly weighted magic user