Depending on their inherent nature, the Mysteries of the Origin Sea were divided into twelve different lineages. However, even among the twelve lineages, based upon their differences, the Mysteries were further divided into different Series, branches, and subbranches. Gravity was exactly one such subbranch of Mysteries that went all the way up to Grand Rank, before merging with subbranches of similar forces at the Supreme Rank. This was what Alnea knew about the Mysteries of Gravity. Other than the effects of Gravity, of course.
Apparently, Gravity was a fundamental force of the world which ensured that things would come back to the ground after being thrown in the air, and not just fly away. Similarly with people, and other living beings, it ensured that they would come back to the ground when they jumped, and not just stay floating in the air. Even with the mountains, one of the natural forces acting against them, pulling them down to Earth, was Gravity.
In fact, one of the Glyph Arrays inscribed on his dagger, Golden Yearning, was from the subbranch of Gravity. It was the Glyph Array which he often used to increase the pull of the ground on the Oren Beasts, making it hard for them to move. But it was exactly this effect of the Glyph Array that had made Gravity elude his understanding.
According to his estimation, all the effects of Gravity pointed to it being a part of the Earth Series of the lineage of Creation. Yet in actual classification, Gravity was classified as a subbranch of the Action Series of the lineage of Day. This strange contradiction between the effects of the Mystery, and its recognised lineage had always left him a little baffled. That was until he compared Gravity to the Mystery that he had just encountered.
A strange force that pulled on the senses of his Spirit, making it stick to the circle, no matter how it rotated; a strange force which seemingly pulled all of the thread like waves together, and formed a giant sphere; a strange force which made him feel as if his Spirit was being pulled within itself; a strange force which created the circular path of the spheres, before causing them to collapse at the centre. No matter how he looked at them, all of those forces seemed similar to the attractive force that Gravity had.
Except, Gravity pulled everything to the ground, while the strange forces that he had experienced came from within himself, as well as all the waves, at both, an individual level, and a collective level. However, what if the Gravity that he experienced from the ground did not come from it as virtue of being a part of Earth, but from it being a physical object? What if, just like how the strange force had existed inside of him, and of the sphere, it also existed within the ground?
That would explain a lot of things, Alnea thought. Not the end part of the Mystery, of course. It would also not explain why the giant sphere had exploded. But if he ignored those parts, then the Mystery seemed to fit all the criteria of being a Mystery of Gravity. If so, then…
Suppressing his excitement within the Serenity of his Heart, Alnea turned around, and made his way back towards his Domain. Though he still had some Spirit Power left, and could Wander for a bit longer, he had other important things to do. Wanderers could not advance by just Wandering the Origin Sea, after all. Corroborating their gains from their Wanderings was just as important for them. And that was what he needed to do at the moment.
Bidding farewell to his reluctant friends of the Origin Sea, Alnea stepped back into his dark, and empty Domain, allowing the golden light from the edges of the giant hole behind him to close the door to the Origin Sea, before dispersing back into the darkness of his Domain. His Wandering was finally over. His work within the Origin Sea, however, was not.
Reaching out to the endless Oren existing just beyond his reach, he pulled them into his Domain. Not all of it, of course. He pulled just what his Spirit Power would allow, forming a second cloud of Oren inside of his Domain. It was a bit dull, and colourless when compared to the first cloud shining in a dark blue light, with occasional flashes of silver streaking across its length, but that was just because it was missing something.
And so, he reached out to the mass of Oren floating in front of him, giving it what it was missing. Rhythms, variations, and his comprehension. They were not enough to completely transform the mass of Oren. To make the second cloud of Oren shine like the first cloud, he needed to test his comprehension. And this time, he had enough Spirit Power to do it within the Origin Sea.
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However, he was not sure about his comprehension this time. He had skipped on a couple of things while forming the prototype of the Mystery, after all. Maybe even more. Things would be fine if the Origin Sea accepted his comprehension, but if it did not, then he would have to face its wrath. Especially if he tested his comprehension within the Origin Sea itself.
With his current reserves of Spirit Power, experiencing a severe backlash from the Mystery would be the least of the consequences. He was so unsure of himself, that he did not even inform Yuri of what he was about to do. Still, he was not foolishly reckless. Why would he take the risk of testing his comprehension in the wild reaches of the Origin Sea, when he could do it in the dark expanse of his Domain?
Reaching out to the thread connecting his Spirit to the Origin Sea, Alnea infused his Roots with the rhythms of Gravity, and what he had comprehended of it, sending his summons out into the Origin Sea. And omniscient as the Origin Sea was, it picked up his summons the moment he sent it out, responding immediately by sending the Mystery of Gravity, the one he had encountered just a while ago, into his Domain.
And just like that, a strange silence descended around him, as the Mystery manifested in his Domain, ready to pounce upon him, and let him experience its effects. This time, probably in all its glory. Before it could do so though, the rhythms, and variations of the cloud of Oren in front of him attracted the Mystery, making it lose all its interest in its summoner.
Forgetting about him for the moment, the Mystery turned towards the cloud of Oren, as if looking at it with curiosity, before reaching towards it with hesitation. Not on a level that Alnea could see, or observe, but he somehow instinctively knew that the Mystery had reached towards the cloud of Oren, just as how he instinctively knew that the prototype of the Mystery that he had created with his understanding had reached out in return, and grabbed hold of the Mystery, before pulling it into the cloud, into their battlefield.
Though the latter may also have something to do with the flashes of light, varying in both colour, and brightness, that was released the moment that the two sets of Mysteries, one prototype, and one original, began their struggles. A tug of war, where one of them was trying to devour the other to complete itself, while the other was trying to devour the other for the offence of daring to imitate its glorious self.
For a while, flashes of light filled his Domain, driving away the darkness. Just in the area around him, of course. At the same time, the fight between the Mysteries was probably leaking all sorts of aftermaths, like the forces of Gravity, or the strange explosions, which he was still not able to understand. He probably would not be able to understand them even after experienced them again though, so Alnea chose to keep his distance from the fight.
Even then, occasional flashes of a golden light still tore its way through to him from time to time, reaching him before he could even think of dodging them, making him go through all sorts of experiences. Sometimes, they would completely disorient his senses. At other times, they would bring a mountainous pressure to his Spirit, making him feel as if he was about to crumble under his own weight.
There were even times when the strange forces of gravity acted on his Spirit, making it go around the battlefield of the Mysteries. Thankfully, he did not have to go through those explosions that he had observed in the Origin Sea. Probably because he had not included them in the prototype of his Mystery. Still, the aftermath of the battle of the Mysteries was much greater than he had expected it to be.
Maybe it was because the Mystery of Gravity was a bit more profound, and had stronger effects that the first Mystery he had comprehended. After all, even the Mysteries of the same Stage, and Rank could have differences in their strength. Like the Mystery that had manifested at the edge of Yuri’s Domain on her first Wandering. That was one of the strongest Mystery in the Initial Stage of the False Rank.
Fortunately, the war between the Mysteries was just a test of his comprehension. And so, when the Mystery that he had summoned failed to devour the prototype he had created with his comprehension, it slowly began to lower its defences, allowing the prototype to slowly gain advantage over it, and swallow it whole, gaining recognition from the Origin Sea, and transforming into a Mystery. One that he could create Arcanas with. After interpreting it in a way that could be used in his world, of course.
However, the Mystery was not done yet. The phantom lights from the fight between the Mysteries had yet to fade, when his new Mystery started transforming his Domain, beginning with its former battlefield, the cloud of Oren he had summoned, giving it a bright golden hue, lighting up his Domain. Not even the darkness of his Domain was able to swallow it. After all, both the golden hue, and the Mystery were a part of his Domain.