— Bright Tai Chi Pangu Sword Capabilities —
First of all, it had to be known that Bright Tai Chi Pangu Sword could only be done by combining two techniques, which is Yang Sword and Yin Sword.
Yeon-woo nodded heavily. Although Edora succeeded in protecting the Psychic Medium from Laplace, she couldn’t do more than that. The Yang Sword was lacking when compared to the potential of the Bright Tai Chi Pangu Sword.
“It’s because it wasn’t in harmony with its other half, the Yin Sword. The Yang Sword and Yin Sword aren’t special at all when they exist separately. They must be combined as one for their true appearances to shine through… only then can the curse of the system be repelled.” - SLR Ch. 627
[1] Yang Sword, is the power to make law of the world revolve around one's body.
A strong whirlwind rotated around Scythe in a clockwise direction. When Kronos released his vestiges to fit the frame of the world, the law of the world began to revolve with him as its center. Soon, the strong wind that rotated around Kronos ascended upwards towards the sky and became the sun, yang. - SLR Ch. 683
[1.1] It's the same case with Yin Sword, just that it's counter clockwise.
Yeon-woo’s yin sword rotated its forces in the reverse direction and slowly sank downwards as it became darkness, yin. The conversely rotating air currents and forces did not interfere with each other, but rather, they interlocked like cogs to accelerate each other’s rotational speed. - SLR Ch. 683
[2] It will boost its power depending on the user's Will.
『Oho. Its power is amplified by several multiples based on the release of one’s will…!』
[3] Even the imperfect Bright Tai Chi Pangu Sword could already wreak havoc to the Tower's System and even breaking free of it, where System is basically the Law of Causality itself.
Yeon-woo was shocked again. Divine iron, law of causality, and the system—these all referred to the same thing? He hadn’t known the law of causality that bound the beings on the ninety-eighth floor also applied to players as well. ‘No. I suppose it’s obvious, in a way.’ - SLR Ch. 490
Soon, the world assimilated with the power and began to shake. [An unknown force wants to break free from the constraints of the system!] [Warning! An enormous amount of information is flowing out. The system cannot process properly. System lag is occurring.] [Warning! The computation of the massive amount of information is slowing the system down. The system may soon shut down.]
[Warning! An unknown force is wreaking havoc on the entire system!] [The control unit has stopped operating!] Throughout all this, Yeon-woo realized that this was the true Bright Tai Chi Pangu Sword.
[All functions supporting the seventy-seventh floor have been paralyzed.] [The stage is collapsing.] The world full of light and darkness was crumbling. Like how mixing white and black paints would turn the paint’s color gray, the entire stage was bending, refracting, and distorting. The space was becoming increasingly gray. The Tower’s system had been disrupted. Then, once all information processing functions such as comparison, calculation, and judgment were forcefully stopped, Allforone’s rapid movements also stopped. - SLR Ch. 683
[4] Bright Tai Chi Pangu Sword mixed two opposing forces, which is Yin and Yang that is a Duality, that tried to change the world's laws.
This was the Bright Tai Chi Pangu Sword. The two opposing forces that tried to change the world’s laws were intertwined and constantly returning to each other, Tai Chi. As a blessing of mixed, opposing wills, its shape was reminiscent of the basic material for the creation of the universe, an egg from which a giant was born, Pangu. And the unfolding shape was reminiscent of a sword. - SLR Ch. 683
[4.1] It also had to be known that by world's laws/Laws of the Worlds/also known as the Law of Nature, it refers to Idea. So basically, changing the world's laws is the act to change the Idea.
In contrast to his appearance, however, there was something overwhelming about him. Idea, the law of the world, surrounded him. Despite that, Changsun had never seen or heard about such a being. - DTR Ch. 286
[4.2] Proof for Duality.
The three stages of heaven, earth, and being were derived from the duality of yin and yang, leading to the classical elements, then the five elements. From there, the six pairs of yin and yang arose, leading to the seven stars and eight trigrams. Then, the perfection of the nine expedient means developed into the ten paramitas. The inevitable return of all worldly affairs back to the duality of yin and yang was a topic that Yeon-woo had listened to the Martial King speak about endlessly.
『The Five Elements and the Eight Trigrams are branches of study created to discuss and understand the laws of the world. However, the content and details of these branches of study are bound to change. That’s probably why you’ve faced so many ups and downs in developing Sword Thunder. For example, a difference in interpretation or a waste of energy efficiency may have arisen without you even realizing it.』 - SLR Ch. 537
^ even the Five Elements and Eight Trigrams that were derived from the duality of Yin-Yang could already be used to understand the Laws of The World.
The <Supreme Light> expanded universes and brought knowledge and wisdom to each civilization to develop conscious beings, while the <Dull Darkness> embodied the universes themselves, giving conscious beings space to act in. Although it seemed at first glance as if light and darkness would fight, they did not; rather, they meshed with each other, making up the laws of universes and worlds.
However, the <Supreme Light> and <Dull Darkness> were just entities in charge of ‘stages’ and ‘characters’. They did not provide those characters with rules to guide them in leading their lives. That was why there was an entity beside the two dualistic powers that adjusted those rules as the occasion demanded. - DTR Ch. 286
^ mention of Dualistic Powers.
This was because the Black King’s traces remained all over the universe. From the unconsciousness of all creatures to the cycle of the soul… death, darkness, dreams, soul, winter, evil, destruction, so on and so forth. The negative concepts that made up the world were all part of the ‘Black King’. The Black King was those negative concepts. ‘If you juxtapose the Black King with the Heavenly Demon, a dualism could be seen… ’ -SLR Ch. 698
^ the Black King acts as the Yin of the dualism, while the Heavenly Demon acts as the Yang.
[5] Perfected Bright Tai Chi Pangu Sword
However, the eighth extreme sword thunder strike did not only contain the principles of the Eight Extremes of Sword Thunder. It also contained the principles of the Bright Tai Chi Pangu Sword. It was what Yeon-woo utilized when he tore down the Tower, and he had completed it after repeating countless mistakes in the darkness.
From the movement, the Martial king saw another universe within. Life and death. Positive and negative. Light and darkness. Fire and water. Above and below. Left and right… He saw opposite properties, like two sides of a coin, but they were also inseparable. Tai Chi was the mixing of two opposing forces and turning them around, and Bright Pangu was the act of breaking free from this cycle.
^ Contained Dualistic powers and even breaking free from them.
The realization of the Bright Tai Chi Pangu Sword started from there. One must throw away the preconceived notions one had and escape from the overarching providence by untangling oneself from the superstructure.
However, despite his achievements and realization, the Martial King had not been able to obtain the Bright Tai Chi Pangu Sword until the end because his very existence was completely entangled in providence. It was a limitation that one had since birth, and it was also a weakness that every existence possessed. - SLR SS Ch. 24
^ One who could obtain and use Bright Tai Chi Pangu Sword must throw away their preconceived notion they had and escape from providence/fate or to say, to be independent from fate as they untangle themselves from providence itself.
In conclusion :
1. Law Manipulation that could affect duality of Yin and Yang, and Conceptual Manipulation type 1;Alteration.
2. Causality Manipulation
3. Atleast Resistance to Fate Manipulation, and possibly Acausality type 4 via being unbound by Laws and Fate, where as the technique itself is breaking free from the system's constraints because of its very own principle that the users must realize, and that's one of the basic requirement for one to use the technique.