Archive of Our Own ^beta

For ten years, Kai’Sa fought– ten long, hard years, starting at a time when she should have been enjoying life at its most carefree. It was not a fight that she was forced into. It was a fight that she stumbled into, sparked by her good intentions going horribly awry in releasing penned animals already ruined by the Void. And what had her foolish good deed earned? The destruction of the only place she had ever known, along with the death of everyone that she loved and cared about at the time. At any time, Kai’Sa could have simply stopped fighting and embraced the despair her circumstances warranted, but she did not.

Was it for vengeance? Of course it was, in part– the first Void monster she killed became her armor, her weapon, her opportunity to strike back against the unspeakable monstrosities she had unwittingly released. Whatever innocence she had was swiftly washed away in the purple-black blood of the Void’s evil. By her eleventh birthday, very little remained of the girl she once was. With nine years having passed since then, nothing did. She was an entirely different person, hardly remembering what the Shurima of her girlhood was once like. 

Ten years of fighting had changed her, leaving deep scars and forcing her to adapt to her circumstances or be swallowed whole by them. Over half her young life had been dedicated to fighting the Void, once she escaped the nightmarish labyrinth she had been trapped in. But not all of that fighting was for vengeance . Although she was known as a hunter of the Void, the bulk of her battle was internal.

The Voidling that had become Kai’Sa’s symbiote was not dead. It was not alive, but it was not dead either, trapped in some sort of conscienceless limbo. It lacked the intelligence that some of her hunted quarry showcased– it operated as an extension of her will, a muscle constantly strengthened, new capabilities discovered as she fine-tuned her control over it. In all those ten years, Kai’Sa’s suit had never come off her skin. Her first fight against the Void had been killing it, and the second was trying to rip it off her flesh.

In ten years, that was the only fight against the Void that Kai’Sa had ever lost. It was fused to her. Parts of it would slide or ooze apart as needed, but never would it fully come off. The subtle influence it exerted over her mind and actions took some time for her to recognize. It was not entirely vengeance that drove her. Kai’Sa’s suit had a natural hunger to devour its brethren, to consume, to feast, to assimilate, to learn. That, she understood, was no small part of why her suit kept going stronger. She grappled with its more brutal or ravenous tendencies and kept them suppressed. The symbiote was hers to control, not the other way around, and she was certain that she could keep the decade-long status quo going forever.

The Daughter of the Void was, in so many words, cocky about her circumstances. How many great men and women had fallen to the Void’s corruption, certain that they could control the uncontrollable? With each victory she won over the Void, the end result of Kai’Sa’s union with the symbiote only hastened nearer and nearer, until it awoke. For long weeks, the revived Void symbiote faked its dormancy, watching, planning, biding its time for an opportunity whilst allowing the Daughter of the Void to continue nourishing it.

Then, at a moment when her guard was at its lowest, the symbiote made its move. It was at the end of a long, vicious hunt, one that would have left any normal human woman exhausted and weak. The suit supplied Kai’Sa all the nourishment and energy she needed; she was used to being awake for days at a time, relying on the stamina that it gave her. When the symbiote cut that off and she found herself weak-limbed and dizzy in an instant, Kai’Sa didn’t know what was happening– she simply groaned and slumped to her knees. Without the suit, she was no mage, no warrior, and certainly no hunter. She was a normal human woman.

Ripe. Untouched. Her symbiote suit had no intention of devouring her or discontinuing their mutually beneficial union. It would simply continue under its terms, not hers. It made no effort to communicate this to Kai’Sa, whose hands fell to the stone floor beneath them to keep herself upright. The young, purple-haired woman gasped hard and fast, unused to the built-up burn of muscular strain she had never felt before. “What… What's happening…?” she asked, struggling to lift her head and look for the source of what must have been an attack from an ambushing Void creature.

She had been caught in such ambushes before, but Kai’Sa had always fought her way through them, even when things seemed desperate. Even weak and reeling in confusion, there was a confidence at her core, derived from the ever-presence of the suit on her skin. Only an unmistakable defeat could possibly undermine it–

–That, and as it turned out, the feeling of the suit beginning to lift and leak off her skin, steadily expanding around her. The ruins that Kai’Sa had been hunting in were well-lit by enchanted braziers that had been burning for centuries, but she quickly found herself trapped in darkness as the suit formed a prison of Void-flesh around her, a cube, a cage without bars or even air-holes for ventilation. For the first time in over a decade, Kai’Sa found herself naked, already pale flesh paler where the sun had not been allowed to touch it.

Looking down at herself in dull-eyed shock, Kai’Sa could not see the nudity that she suddenly felt. Not a hint of light penetrated through her symbiote. It was as if a blindfold had been wrapped tight over her eyes. Beginning to panic and knowing that she could not remain where she was, the woman began to scramble forth in a crawl that only had her bumping into the slimy wall of her cell. Though it was sticky, she could pull away from it easily enough. Next Kai’Sa tried to stumble up, but the cube trapping her was practically a box. She couldn’t even kneel.

As a child, Kai’Sa had been claustrophobic. Being trapped underground had forced her to confront those fears and get past them, but now they came flooding back. Gotta… do something, she thought to herself, adrenaline trying to shake off the worst of her lactic acid but failing to amount to anything meaningful. She had ten years of combat weighing her down; being nothing more than a normal mortal, it was impressive enough she wasn’t collapsed and unconscious. With all the strength that she could muster, Kai’Sa threw herself at the wall, tearing with her hands and biting, desperate.

The symbiote did not give. Even when Kai’Sa managed to tear away chunks, they grew back more quickly than she could grab another fistful. It almost seemed to shudder with amusement, allowing its former wearer to exhaust herself in the futility of her struggle. Then, as Kai’Sa began to flag, it struck back. First came the gas that it had prepared. Though scentless to the captive woman, it felt warm– or rather, its effects on her physiology left her feeling very warm. Warm in ways that Kai’Sa had never felt before, thanks to the suit. In its prior dormancy, it had taken care of all her biological needs and staved away those she had no need for.

Now, alive again, it sent her reproductive functions into deep overdrive. Kai’Sa squealed out sharply as it spread through her system. For a moment, the darkness before her was white-hot, matching the flare and rush of the lust that took hold of her. What iota of strength she had found inside herself to attempt her escape was quickly crushed as her virgin twat exploded with persona-breaking bliss, hips shaking violently as it squirted again, again, again. 

Kai’Sa had no idea what was happening. Oh, she knew what sex was, what orgasms were, even if she had no interest in them. Divorced from what she was feeling, she could have identified the means of attack being employed against her. But under that assault? There was no thinking , there was only feeling , and the feelings were too good for her to resist. She lost the fight against her symbiote suit before she could realize what it was, sweat building on her skin as her pussy flooded with wet need. The sense of warmth grew even hotter over her abdomen, as her ovaries prepared for what chemical signals warned them was coming.

At the moment Kai’Sa was most receptive,  the symbiote struck again. The prison that it had formed around her was small, but it still had space in it– space it began to fill with one tentacle after another. Its first one went straight for Kai’Sa’s moaning mouth, driving deep and straining both her jaw and her throat as it began to surge through her. From that point forth, Kai’Sa’s cries were stifled. The offending face-fucking tendril nearly reached her stomach, slimy residue coating her tongue and tonsils as it pumped away. Every few seconds, it spurted straight down into her gut.

Though it choked her, Kai’Sa’s lungs continued to work steadily. Small pores on the tendril pumped air out and sucked out her exhales, taking care of all her breathing. Each ounce of black, tar-like Void cum it dumped inside her belly offered her a new form of nourishment, while further preparing her for her transition. No longer would Kai’Sa be the Daughter of the Void, a vicious huntress on an unending crusade, using her enemy against itself. When the symbiote was finished with her, she would be Kai’Sa, the Mother of the Void– a vicious huntress on an unending quest to nourish her young with Void energy.

The brain-rewiring orgasms did not stop or slow down for the presence of an enormous lump coursing down her gullet. None of the tentacles were without their purpose. Some were more tongue-like than cock-esque in texture, rubbing corruption across her skin and smearing it in deep. Many others wrapped around her, leaving very little of her skin exposed. Several had mouth-like endings, locking suckers around her nipples and clit. The former set worked overtime to ensure Kai’Sa’s human milk would be fit for the children she would bear for her symbiote suit, as the price for its power.

Within seconds of her throat’s initial claiming, two more thick purple tentacles were pushing into her ass and pussy at once. Their size should have made it impossible for them to simultaneously fit, but KaiSa’s body had been prepared for that inevitability. Her body adapted, no longer human. The cervix that should have worked as her body’s last line of defense against an intruding cock became little more than a cunt-within-a-cunt. As it pumped away inside those unexplored depths, the tentacle adapted too, forking into two to simultaneously fuck right up against her ovaries. Though both ends constantly shot black Void cum, Kai’Sa could not simply be inseminated. Breeding half-Void life was a long ordeal. One little sperm cell could not fertilize an egg alone.

It would take millions, and millions would take weeks to complete. Kai’Sa had unwittingly ensured her symbiote could spend years breeding her, if it so desired. She was never permitted a moment to realize her mistake, or grapple with anything but the unending deluge of pleasure. Minute by minute, hour by hour, day by day, she became more and more cemented as her suit’s slut. In a world where the symbiote was eventually removed from her skin, Kai’Sa surely could have gone on to have a healthy sex life– but after nearly a month of non-stop fucking by the tentacles, nothing but Void cum could ever satiate her.

When it was confident new Void creatures were thriving inside Kai’Sa, the tentacles began to retract from her overly-fucked body, and the fleshy cube around her started to squeeze shut around her too. As the suit reformed around her, the symbiote went back into its slumber, ready to awaken with the birth of its young and give unto Kai’Sa another set of quadruplets. For a day Kai’Sa simply laid there on her back, one hand on the plump rounding of her pregnant belly with a motherly smile glowing on her unconscious face.

Though there were never words between her and the symbiote, Kai’Sa understood the new deal, and she was grateful for it. She would have a family again, and a worthy purpose behind her hunts.