Satoru quickly snuffed out the minuscule volume of True Negative Cursed Energy he'd created, letting it dissipate into the air. Summoning that tiny sliver had been painfully difficult, but he'd done it and, for some reason that he still couldn't quite figure out, exposure to True Negative Cursed Energy had debilitated the Eldar, sending them all to the floor, dangerously close to death, he figured.
What the fuck?
That didn't make sense... unless... unless they were artificial beings who relied almost entirely on Cursed Energy to exist – Positive Cursed Energy to be exact, which would explain why their Craftworld was so saturated in it. So, that meant these aliens didn't evolve naturally, but where either created for a specific reason or some other race of super-sorcerers interfered in their natural development and jammed a boatload of Positive Cursed Energy right up their alien asses.
Or something like that. Satoru couldn't be certain as to how they might've been created or what they were designed for, but something of this nature couldn't possibly be natural. Living beings emitted Cursed Energy as a byproduct of emotions, mostly negative emotions, though it was argued that positive emotions aided just as much as negative emotions did as Positive Cursed Energy did exist alongside Neutral Cursed Energy in nature, without sorcerous intervention. But, Satoru had never heard of natural beings who relied on the presence of Cursed Energy, positive or otherwise. The only creatures that kind of fit that bill were the Cursed Wombs and, even then, they could probably survive direct exposure to True Negative Cursed Energy.
Unlike these aliens.
Damn.
Right, the Eldar were all down and hopefully not dead. Satoru's mind raced. He'd expected some fear, maybe even disgust, but this... this wasn't in any of the possibilities he'd reached in his head. Their bodies seemed to rely almost entirely on Positive Energy, Negative and True Negative Energies were more or less poisonous to them, the latter apparently being mortally dangerous. He didn't want them to die. Or, a better thing to say would be that he'd prefer if they didn't die; that way, there would be far less drama and unnecessary conflict – as fun as it would be. Besides, these aliens had never done anything malicious to him and, as such, did not deserve any malice from him.
Still, if they did die, then what the hell; he had bigger things to worry about.
And yet, he had to find a way to save them somehow. And therein lay the problem.
There were no medical supplies in the entire vessel but, even then, the supplies were designed for human use and not alien first-aid, which meant his only option was to use Reverse Cursed Energy to try and heal them – easier fucking said than done.
Right, how the fuck did Shoko and Yuta do this? To be entirely fair, he hadn't exerted too much effort into learning the damn skill, but – of the two to three times he did try – he always seemed to fail badly, like trying to walk and then falling face-first into the ground type of failure. He'd never quite figured out why it seemed impossible for him, though he did have a few theories. One idea he had involved his automated use of Infinity, which required the creation of a locus that channeled both Positive and Negative Cursed Energies at all times, which allowed the filtering effect; in short, he was too preoccupied doing other shit. And yet, now, more than ever, he had to try.
Without disabling Infinity. That part was important. He was willing to try his best to save these aliens, but he wasn't going to endanger himself if he could help it.
The Eldar writhed and shuddered on the floor. Satoru gritted his teeth as he had to choose between healing the warriors or the Farseer, who was most definitely a person of rank and influence. Eh, screw it, he was saving the most important gal first. And, if he was successful in his attempt, then he'd move on to the others. So, Satoru breathed in and knelt down and placed his hand over the downed Farseer's chest, just enough to get a proper feel of the flow of her internal Cursed Energy as Six-Eyes wasn't quite enough for that particular task.
She also had boobs. As in humanoid boobs that looked almost identical to human boobs, which was very weird, considering she was definitely an alien. Very weird and very cool, but Satoru quickly shifted his attention elsewhere, somewhere deeper, to the very fabric of her being, her soul, which had been severely damaged by her very quick exposure to that minuscule amount of True Negative Cursed Energy. It was fortunate, then, for all of them, that Satoru had chosen to retune and convert only a very small portion of his Cursed Energy; if he'd converted all of it, then they would just be dead. Straight up.
Cool.
Right, he was going to heal her. How? Well, fuck if he knew.
But, a good place to start was by looking inwards. How exactly did Reverse Cursed Energy heal a sorcerer? Well, that was a question that only a Six-Eyes user could answer. And, fortunately, Satoru knew exactly how it worked. Though, he probably should've shared it with Shoko as the knowledge itself, at the time, had been useless to him. First, Reverse Cursed Energy recalls a body's previous state. Was an arm supposed to be present in that stump? Was that patch of skin supposed to be wounded? Essentially, it looks further back to see what changes to the body were considered harmful or unnecessary. But, it didn't heal in the traditional sense and neither did it regenerate lost cells. What Reverse Cursed Energy did was reject the notion that there had been any damage at all; it looks at what is and decides that what was was better, thereby reverting parts or the entirety of the body into a previous state, which wasn't damaged.
Did anyone else know that? Well, previous users of Six-Eyes probably did, but, like Satoru himself, they chose not to share what they found as, ultimately, that knowledge didn't seem very useful. But, now, it seemed like the key to unlocking the secret to healing others, which was embarrassing, because neither Yuta nor Shoko had the Six-Eyes to help them understand the inner secrets and workings of Cursed Energy. Those two were just built different, Satoru mused. Yuta, especially, had monstrous potential. After all, given a few more years and a bunch more experience, that boy would eventually grow to rival or surpass him.
So, the root of it was that Positive Curse Energy "healed" by reverting the body or a body part to a previous state, wherein it wasn't yet damaged, thereby rejecting the reality that it had ever been damaged at all. Where did he go wrong each time? Well, used to be, Satoru would attempt to heal others – all two or three times he did try – by simply generating a large amount of Positive Curse Energy and then shoving said energy into whoever was unlucky enough to be his test dummy. Shoko told him that what he was doing was wrong, but couldn't explain how to do it properly anyway; the same was true for Yuta, who used Reverse Cursed Energy to heal others naturally. So, what was Gojo Satoru missing?
Hmmm... basics... basics... basics.
Maybe, it relied entirely on his perception of what was in order to reject what is?
After all, simply flooding Positive Curse Energy into someone else's body meant it'd enter without a clear goal or access to the memories of the bodily self, since the energy itself came from him and would only have access to the memories of his body and not the body of his target, which meant it wouldn't be able to reject or reverse anything, seeing as it had no idea what the previous state was. But, maybe, if he maintained or understood the previous state of someone, then, perhaps, it was possible to fix them using Positive Curse Energy, right?
Well, no time like the fucking present. "Sorry, madame, but you're gonna have to be a test dummy, okay?"
The damage wasn't physical in nature – or, at least, its origin wasn't physical. Exposure to True Negative Cursed Energy had essentially cracked her soul, leaving her damn near catatonic; the same damage then carried over to her body, creating metaphysical cracks and tears where there shouldn't be any. Yeah, the soul was a complicated thing that directly affected the physical self. If your soul got fucked, then you also got fucked. And the Farseer's soul was definitely fucked. However, it wasn't fucked so badly as to be beyond saving, assuming Satoru could actually get his theoretical knowledge and turn it into something practical. So, if he could save her soul, then he could save her life.
Time to turn theory into practice.
Firstly, he turned his full attention to her cracked soul.
Well, shit, it was cracked alright.
Her soul, fortunately enough, retained a mostly humanoid shape and contour. Weird, considering this was an alien, but there were a few other differences of note, Satoru noted, that made the Farseer's soul distinctly unique or, at least, separate from that of a human soul. Shape aside, the eldar's soul shined with a bright silver light, unlike the gold that colored the souls of humans. It also felt far more malleable, in comparison; in fact, that malleability seemed like an outright feature, if nothing else, but Satoru wasn't quite sure how that was supposed to work, so he ignored it. The strangest thing, then, was the tether that was attached to her soul – alien and unwelcome, like a mark of ownership... or a claim and the even stranger thing was the fact that the source of the claim, its vestigial energy, at least, could be traced back to one of the four, one of the Four Mountains that he was determined to climb over, those god-like beings in the Cursed Realm.
The mark itself didn't do anything, but, with it being tethered to the soul, it seemed likely that, when the Farseer died, the mark would trigger and suck her soul right into the Cursed Realm, to one of the Four – not Tzeentch, however. Satoru had enough experience with that particular entity to know its Cursed Energy signature and this wasn't it. So, it was one of the other three, then – the ones he was rather unfamiliar with. With his own Cursed Energy, Satoru poked and prodded the mark and found that it'd be... awfully difficult to remove, but he'd be able to do it, he figured, using a very carefully controlled burst of Hollow Technique: Purple, to burn away its essence.
How... incredibly interesting.
But, that would come after he dealt with the damage to her soul.
Given her general humanoid shape and build, Satoru found it rather simple to find the memory what her soul would've previously looked like, simply by removing the cracks that were present and by mending the bits that'd fallen right off, kind of like fixing a wall with flaked paint. Slowly, very slowly, Satoru turned bits of his Cursed Energy into Reverse Cursed Energy, which he then inserted directly into the soul of the Farseer.
And here comes the overly complicated part that may or may not actually work. Satoru breathed in focused, turning all his attention into the image of what the soul should look like, essentially creating a false memory for the Positive Energies to follow. Nothing happened. But, Satoru forged on. And, this time, instead of simply flooding the Farseer's soul with Positive Energy, he coated the whole thing in it, creating an outer layer. And, from there, he tried again, envisioning and falsely remembering the image of the soul from before it was damaged. Satoru's eyes snapped open and widened when he saw that, very gradually, the cracks began to disappear, bits of soul-stuff regrowing in places that'd shattered entirely. It was a very slow process, he noted, one that required constant attention; it was also freakishly inefficient, requiring damn near five times as much Positive Energy than it would've taken to fix himself.
But, Satoru grinned, this shit was worth it. Didn't even matter if the Farseer just straight up died at this point, because now... now he had the ability to heal others with Positive Cursed Energy. He never needed it, but it'd always irked him how Yuta and Shoko could easily perform it, while he, the Honored One, could not. But now, that was no longer true – and he was healing a freaking alien with it. About ten minutes later, which was honestly closer to forever, in terms of combat usage, Satoru had fully mended the cracks and breaks in the Farseer's soul – at least, enough that it wouldn't kill or debilitate her anymore, but she'd probably still feel like a sad sack of shit when she woke up, though.
His next object of interest was the mark upon her soul. Satoru breathed in and acknowledged the fact that he'd never done anything like this before, but he also knew that what he was about to do next was completely doable – at least, in theory. But, his curiosity got the better of him. And so he had to try. At worst, anyway, the Farseer would get a small boo boo. At best, he'd be able to get rid of the mark.
Generating an infinitesimally tiny Hollow Technique: Purple was weirdly harder than it should've been – not by much, just in a weird way. Still, he'd done it, a Purple Singularity that was so tiny it could hardly be seen, but it was there; Satoru felt its power erasing everything that came into contact with it. He then channeled Infinity through the Farseer's body, creating a pathway that led directly into the depths of her soul, allowing the Purple Singularity to pass through her body, without damaging anything – again, something he'd never done before, but was totally theoretically doable. Satoru guided the singularity towards the mark, keeping its annihilating power contained with Infinity.
It was only when the Purple Singularity finally reached the mark did Satoru unleash the restraints he'd placed on it, though only for a split-second. But, that was all he needed. The Purple Singularity rapidly expanded, annihilating the mark and its tether in a single expansion, before Satoru then deactivated the ability. A dark, pained, frustrated, angered, and bewildered scream echoed across time and space, rippling across the cosmos.
And Satoru could only raise a brow as the very stars themselves seemed to shift and warp, forming something akin to a face – a snarl, furious beyond measure. But, Satoru grinned right back at the angered god. "Oh, you don't like that, do you? Well, watch me do it again, bitch!"