Commission for  Shintack.
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Hey everyone, posting the first of the the new commissions ^^
I was actually supposed to post this earlier in the week, but got sick and had to postpone it for a few days ;^^

This one features a character I hadn't drawn before, but that had been wanting to for some time, Koyanskaya, from FGO.

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It had been some time since Koyanskaya had been summoned to Chaldea following her defeat in the Tunguska Sanctuary, and while she would repay her debt as she prided herself in always doing so, she hadn’t fully given up on her plan to become a beast of humanity just yet. She had lost quite a bit of her power, but the main ability that could allow her to still fulfill her plan was still intact, her natural ability of assimilating creatures with fur/hair into herself and incorporate them into her new tails.

She had been so close to achieve her goal before, but Melusine had foiled her plans of assimilating Albion into her 6th tail, and things just derailed from there, and now she was back on square one again, and worse yet her plan of assimilating a powerful creature from each Lostbelt was no longer viable as Chaldea had eliminated pretty much all of them already, so she would have to try a different approach to complete her plan, and she already had a plan in mind for it.

While her ability was usually reserved for demonic beasts, phantasmals and divine beasts to an extent, with enough time and patience even other types of furless creatures can also be affected and become hers, so she bid her time and waited, accumulating energy slowly to not draw much attention to herself, all the while entertaining her master, which if she was honest wasn’t that bad, they were adorable to keep around and worth raising after all~

And speaking of her master, her plan would involve a few of their favorite servants, and surely there were some better choices for her plan, but seeing her master's face as they get sent tumbling to the edge of despair once they lost them would be so fulfilling that it would be more than worth it in her opinion. The servants in question that she would be going after would be Lancer Artoria, Mordred, and Morgan; All three of them matched the requirements she needed to fulfill her plan, all possessed non-human qualities, Artoria and Mordred had the blood of dragons, while Morgan was a fae, and those qualities would allow her to assimilate them into her new tails.

The plan was simple, she would use an old trick and send a drugged cake for each of them; it had worked before… to an extent, so she was sure it would work once again, and once they were passed out the next stage of her plan would begin. But unlike other creatures she could assimilate into herself, she was sure servants would be way more complicated, their saint graphs being connected to the throne of heroes made assimilating them quite complicated, so she had devised an alternative, instead of taking a single strand of hair into herself, she would take all of them. Her primal and wild side saw it as just an extension of the law of the jungle where the strong prey on the weak, so she would consume them and let her body absorb all of them, saint graph and all, into herself.

The evening arrived quietly in Chaldea, the usual noise winding down as the day came to a close. In their individual quarters, Lancer Artoria, Mordred, and Morgan each received a mysterious package, beautifully wrapped and bearing a note with their Master's seal. Inside each package was a cake slice—perfectly crafted, each in their favorite flavors, with a scent so intoxicating that it immediately drew them in.
Morgan, skeptical, narrowed her eyes at the cake before her. It was an unusual gift, unexpected, and she couldn't help but suspect it. Still, it was a gift from her spouse, it even bore their seal, and the smell was irresistible, surely it couldn't be anything malicious. “Perhaps it's a reward for my services” she thought.

Artoria, ever the dutiful king, felt a warm sense of gratitude at receiving such a thoughtful gift from her Master. It was rare that she allowed herself many indulgences, unlike her other selves, but this...this was a welcome surprise. She smiled softly as she took a bite, savoring the rich flavors. “A brief respite and then back to my duties” she thought to herself.

Mordred, on the other hand, was overjoyed. "Heck yeah, finally, something worth enjoying!" she grinned, wasting no time in devouring the cake before her. She had no reservations, no suspicions, just pure enjoyment of the unexpected treat she had received from her Master.

But as the sweetness melted on their tongues, and they finished their treat, a sluggish sensation began to take hold. They thought they were just tired as their vision began to blur. They each tried to stay awake, but soon they had fallen deep asleep. The drug had already taken hold. When they woke up at least, the familiar surroundings of their rooms in Chaldea were nowhere to be found. Instead, the three Servants found themselves trapped in a tight, dark, and oppressive space. The air was thick and stifling, carrying an acrid scent that clung to their senses. The ground beneath them was soft and yielding, and the walls around them pulsed with a sickening, rhythmic throb.

Mordred was the first to react, her instincts kicking in as she moved her head quickly to try and take in her surroundings, only to be met with a wave of disorienting nausea. "What the hell... Where are we?" she growled, her voice echoing oddly in the enclosed space. She reached for Clarent, only to find her sword absent. Confusion began to rise in her chest, her eyes widening in a mix of shock and rage.

Artoria struggled to her senses next, her body feeling unnaturally heavy as though weighed down by an unseen force. The space around them felt almost alive, and the realization sent a worried shiver down her spine. "This... What is this?" she murmured, her voice tense but controlled. She reached out, touching what she assumed to be the walls around her, only to recoil her hand, it was warm and slick as it twitched under her fingers.

Morgan, more attuned to the magical energies surrounding them, was the last to stir. Her mind was a maelstrom of confusion and anger. “How could this happen?” she thought furiously, and who was responsible for this? As she focused on searching with her mana, her eyes adjusting to the dim, pulsating light, the horrifying truth dawned on her. "We've been swallowed..." Morgan hissed, her voice low and dripping with venomous rage. "This place... We're inside Koyanskaya."

“Ding, ding, ding! We have a winner~” A dark, sultry voice echoed around them, cutting through their rising tension with cruel amusement. "Oh, how delightful. My three little preys are finally figuring out where they are," Koyanskaya's voice purred, resonating from all sides. Mordred's eyes blazed with fury. "That damned fox! When I get out of here, I'm gonna rip her apart!" She lashed out at the walls, but her fists met only the same soft, pliant flesh that absorbed her blows with sickening ease. "Where's my sword?! Where's Clarent?!" Mordred shouted furiously. “Oh~ Please, do continue Mordred, this massage you’re giving me feels great~” Koyanskaya said mockingly as she caressed her bulging stomach. After consuming her three course meal she had retired to her own personal room to enjoy the process of assimilating some of her Master’s favorite servants into herself in peace and quiet. The bed creaked under her weight, but it still held firm. “As for your sword, why would you need it when you all are about to become part of something greater~” She purred darkly.

Mordred was about to lash out again when Artoria placed a firm hand on her shoulder. "Calm down. Attacking blindly won't help us." Her voice was authoritative, a commanding presence amidst the chaos. "We need to figure out how to turn this situation around. If we're inside Koyanskaya, she must have a weakness we can exploit." Morgan, her mind racing, began to piece together their predicament. "Koyanskaya... She must have used some kind of drug or spell to incapacitate us, and now she's trying to absorb us into herself." The very thought was repugnant to her, an affront to her dignity and power. "But she underestimates us if she thinks we can be assimilated like common beasts."

“That’s where you are wrong dear Morgan. Did you really expect me to do something like this without certainty, you aren’t that foolish are you~?” Koyan asked, amusedly patting her gurgling belly “I went through quite a bit of trouble to not only devise both this method and plan, but also to accumulate the necessary energy to put it into practice, you know~ I even had to work overtime, imagine that~” she continued in a mock hurt voice. “But please, continue being as overconfident as you want, putting those type of people in their place… That is a guiding principle of mine” Koyanskaya said with a cruel smirk.

"Koyanskaya!" Artoria's called "Release us at once, or you'll regret this!" she said in a voice that was sharp, cutting through the air like a sword. "Regret? Oh, sweet Artoria," Koyanskaya’s laughter was sickeningly sweet, laced with malice. "You’re in no position to make demands. I've got you all exactly where I want~ The assimilation process is already starting. Soon, you all will be nothing but a new part of me!” She said cruelly as she gave her belly a hearty slap “But don’t worry, I won’t mess with your free will at all. I’ll just make it so that you three can never disobey me once you become my new tails~ Oh, and the best part? Once I’ve fully digested and assimilated you, you’ll be erased from the Throne of Heroes forever. Never to be summoned again as anything other than my tails~" Koyanskaya said darkly with a predatory smile.

The shock of her words sent a chill through the three Servants. Mordred’s rage flared even hotter, her fists clenching tightly. "You’re insane if you think we’ll let that happen!" She shouted as she tried to hit the walls around her again. "Oh, but it’s already happening," Koyanskaya’s voice dripped with twisted pleasure. "You can feel it, can’t you? My stomach is already slowly working on you, breaking down your mana, absorbing your Saint Graphs. It’s only a matter of time before you all are gone for good" Morgan’s eyes narrowed with fury, but there was a cold calculation in her gaze. "You won’t succeed, Koyanskaya. We will find a way out of this." She hissed out. Koyanskaya’s laughter echoed again, louder this time, filled with sadistic glee. "I love your overconfidence, Morgan~ Enemies who are worthy of tormenting are my favorite, and you certainly make the cut, it will make your inevitable defeat all the more delicious to savor~” She said licking her lips. “But let me be clear, you're not getting out of here. In fact, I think it’s about time I start taking this seriously~"

As if on cue, the stomach walls around them tightened, pressing the three servants closer together, squishing them against each other. The stomach burbled and roared to life and a warm, acidic liquid began to pool around their feet, quickly rising up to their knees, then their waists at an alarming rate. "Did you all think I was going all out before~?" Koyanskaya continued, her voice filled with smug satisfaction. "I was just having fun~ After all If I'm going to crush you anyway, I better make sure I enjoy myself while doing so, don’t you agree? Just like a game of cat and mouse~♡" She said playfully.

Artoria gritted her teeth, her mind racing for a solution even as the acid began to eat through her armor. But she refused to show fear. "We need to stay focused," she said, her voice steady. "There has to be a way to disrupt this process." Mordred snarled, her anger barely contained. "How?!" She snapped, her frustration boiling over as the acid rose higher, the searing pain of it biting into her flesh. "She’s got us pinned, and this damn stuff is burning through everything! At this rate we are just sitting ducks waiting around to be turned into her new tails!" She shouted as she began struggling and trying to punch the walls that now were too close to give her enough space to wind up. “Also, I should have mentioned~ The more you struggle, the more energy you waste, and the faster I’ll digest you. I can already feel some of your power merging with mine... it’s intoxicating. Oh but feel free to continue your useless efforts, after all… the more you hope things are going to be okay, the more delicious your screams will be later♡" Koyanskaya’s voice purred around them.

As the acid slowly began to rise further, the three servants could feel its warmth creeping up their bodies, the sensation both horrifying and unnatural. The stomach acid was thick, clinging to their armor and flesh alike, bubbling ominously as it continued its relentless ascent. It soon reached their chests, and the pain was becoming excruciating. The acid ate through whatever armor they still had with sickening ease, corroding it as if it were nothing more than paper. Their skin began to turn a bright and sensitive red as the acid ate away at their flesh inch by inch.

Mordred gritted her teeth against the pain, her anger and defiance the only things keeping her from screaming. "The Master won't tolerate this!" she spat out, her voice trembling with a mixture of pain and fury. "They'll find out, and when they do, you'll regret ever trying to pull this shit! They will beat you again just like last time!" Artoria, her own body wracked with pain as the acid continued its assault, nodded in agreement, her voice resolute despite the burning pain. "The Master will never let you get away with this, Koyanskaya." Morgan, managed to maintain her cold demeanor despite the pain, her eyes narrowed in defiance. "You may think you’ve won, but your schemes will fail again, just like before, fox."

Koyanskaya’s laughter echoed around them, rich with sadistic pleasure. "Oh, I’m sure our dear Master will be quite upset" she cooed, her voice dripping with mock sympathy. "But don't you worry about that. I’ll have them eating out of the palm of my hand soon enough. After all, I’m very good at turning even the most stubborn humans into my pets. I’ll make them into my most valuable plaything" Her voice dropped to a sinister whisper.

The acid continued to rise, now reaching their shoulders, the heat and pain was unbearable. It seeped into every crevice, burning through clothing, armor, and skin alike, and the Servants could feel it gnawing away at their very being. Their magical cores, once sources of immense power, were now under siege, the acid dissolving them bit by bit. The sensation was unlike anything they had ever experienced, an erosion of their ‘self’, a slow and torturous process that left them feeling weaker with each passing second.

Mordred, ever the fighter, tried to channel what little magic she had left, attempting to summon even a flicker of her power. But the acid was relentless, absorbing every spark of energy before it could manifest. The walls around them seemed to pulse with satisfaction, feeding on their mana bit by bit. "Damn it...!" Mordred cursed, her voice hoarse from the effort, but it was no use, the acid was too strong. Artoria struggled to remain calm, focusing her mind on resisting the pain, but it was a losing battle. She could feel her Saint Graph beginning to fray at the edges, the acid working its way into the very fabric of her existence. "We can’t let her win..." she muttered. The acid was relentless, and it was taking everything she had just to stay conscious. Morgan’s defiance was slowly giving way to a cold, creeping dread. She could feel her magic being siphoned away at a rapid speed, leaving her more fatigued with each passing moment. The acid was dissolving everything, her mana, her body, her soul, reducing her to nothing more than fuel for Koyanskaya’s twisted ambitions. "This... This can’t be how it ends..." she thought, but even her willpower was fading, the acid sapping her strength until she could barely hold onto consciousness.

Koyanskaya basked in their suffering as she watched her stomach gurgle, her voice a taunting melody that filled it completely. "Oh, how the mighty have fallen," she purred, savoring every moment. "And here I thought you’d put up more of a fight," Koyanskaya sneered. "How disappointing. But don’t worry, your power won’t go to waste. I’ll make good use of it. In fact, your Saint Graphs are already starting to merge with mine, piece by piece. Soon, there won’t be anything left of any of you, and you’ll be just another part of me, my new tails, completely under my control." She laughed again, the sound cold and merciless. "You should feel honored, really. You three will live on as part of me, contributing to my strength as I eradicate the human race at my own leisure"

Artoria’s eyes blazed with determination. "This isn’t over, Koyanskaya. We will fight you until our last breath. You cannot erase us!" She shouted weakly. "Oh, but I can, and I am," Koyanskaya’s voice was a whisper in the darkness, filled with triumphant malice. "In a matter of moments, you’ll be submerged completely, and the assimilation will begin in earnest. It will be slow, excruciatingly slow, as your mana is drained, your Saint Graphs eroded until nothing remains of who you once were~ And then, you’ll be gone, erased from existence, never to be summoned again~”

The acid finally rose above their heads, submerging them completely. The last thing they heard was Koyanskaya’s mocking laughter, a final, cruel taunt as their vision blurred and their strength ebbed away. The walls around them squeezed even tighter, forcing the stomach acid into every corner of their bodies, as it seared their flesh, their magical cores, their very essence. Artoria summoned every ounce of her willpower, trying to channel her remaining mana into one last, desperate push. But the burst of energy was immediately absorbed by the surrounding flesh, siphoned away before it could have any effect.

"Foolish" Koyanskaya said to herself in a dark victorious whisper. "You belong to me now."

As the acid continued its slow, torturous work, dissolving their bodies and eroding their Saint Graphs over the course of the next 2 hours or so, Koyanskaya enjoyed the sensation of their power merging with hers as she relaxed on her bed, following the example of one of her original’s alters and taking a nap.

Once she woke up again It was to a feeling of absolute victory, of domination over those who had once thought themselves her equals. Her belly had returned to its trim appearance and there were no traces left of the three servants she had consumed. "Welcome to your new existence," she purred, her voice filled with wicked glee. "As part of me."

And with that, the three servants were no more. She sighed in satisfaction, feeling a rush of power coursing through her as her new tails formed from what used to be them, each one a testament to her cunning and their defeat. It was a victory as sweet as it was cruel, and as she stretched her new, enhanced form, a wicked smile played on her lips. The assimilation process had worked flawlessly, and now their Saint Graphs were firmly integrated into her own, strengthening her already existing abilities, and manifesting only as the 3 new tails which swayed behind her in a triumphant rhythm. Each tail reflected the essence of the servants she had just devoured, the three new additions radiating with the distinct aura of their former owners. Mordred’s was of a dirt blonde color, and crackled with red lightning, Artoria’s was golden in hue, and sparkled as light rings encircled it, Morgan’s had a platinum gray coloration, and emitted a dark aura along with dark blue flames.

Her smug smile grew wider as she admired her enhanced curves. Her body had grown noticeably fuller, particularly her hips and ass, which now commanded even more attention. Her tight, form-fitting suit now stretched deliciously over her new voluptuous form, accentuating every curve even more than it already did before. She couldn't resist giving her plump rear a playful shake, feeling as her tails swung lightly along with it. There was a knock on the door, and a moment later her Master, Ritsuka Fujimaru, entered her room, still unaware of the fate that had befallen some of his beloved servants.

When he finally set his eyes upon her the sight that greeted him made him freeze in place. There she stood, Koyanskaya, but she looked different from before, her body had changed so much since he had last seen her barely a day or so ago that he couldn’t believe it, but what truly shocked him was when he noticed her tail, or actually tails would be more correct now, as where previously she only had one upon being summoned to Chaldea, now she had 4 fanning out behind her like a deadly bouquet. The energy that was radiating from them was quite noticeable, but more than that Ritsuka recognized the energy as familiar.

"Surprised, Master?" Koyanskaya purred, her voice dripping with honeyed malice. She turned her body slightly, giving him a better view of her enhanced figure, particularly her generous backside, which she flaunted with deliberate, slow movements. "I’ve acquired some new... assets. It seems some of your precious servants were quite useful to me after all~" Ritsuka’s eyes widened as he realized what she meant. "No... you didn’t… that shouldn’t have been possible… how…" he whispered, his voice shaking with disbelief. Koyanskaya's laughter was rich and mocking. "Oh my, Master, you don’t look so good, what are you trying to say, did the cat get your tongue perhaps, dear~?” She asked in fake concern “Don’t be sad, Master, they served their purpose well, becoming a part of something much greater than they could ever be~" She said as she gestured to her tails, each one brimming with the absorbed the powers of the servants she had assimilated.

She stepped closer, her hips swaying seductively with each step, her tails fluttering like deadly ribbons behind her. "And you know what the best part is? Their free will and conscience are still intact~ It’s just that they can’t do anything more than sway beautifully behind me now~" She purred as she ran a hand down her side, tracing the curve of her hips before letting it rest on her plump rear, giving it a firm squeeze. Ritsuka clenched his fists, his heart pounding as he considered what to do, but Koyanskaya leaned in close, her eyes gleaming with a predatory light. "Oh, you wouldn’t happen to be planning anything futile in this little head of yours, would you, Master~?" She asked smugly “I would hate to have to take… let's say, drastic measures, if you were” She leaned back, with a smirk reveling in the power she now possessed, and the fear in Ritsuka's eyes only fueled her more. "So, Master, what will you do? Will you fight, knowing it’s hopeless? You do know I don’t actually need a master, it would be a shame if I had to break our contract, after all I quite adore having you around, just like a cute little puppy~”

Koyanskaya’s tails flicked in anticipation, the energy swirling within them, ready to be unleashed at a moment’s notice. She knew she had him cornered, and the thrill of that power made her blood sing with excitement. Ritsuka’s resolve wavered as he realized just how outmatched he was, alone against her like this, she would be done with him before he even reached the door. “Come on, Master, what are three little servants compared to having an upgraded me around to help you~” She purred as she cupped his face in her hands “I’ll be sure to raise you into a magnificent master, after all you’re so interesting to be around~” Koyanskaya’s smile widened, her eyes narrowing in wicked delight. "Oh, but you fighting back wouldn’t be bad at all either, Master~ After all, just like how I love raising interesting humans, I also love to consume them~ So, what do you say~?”

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- And here it is, this was a fun pic to work on overall, and the concept was interesting too XD

- I tried to make the story for this one a bit differently with more dialogue from the character, but let me know what you guys thought compared to how I usually do it.

-------------Extra Link-----------------

https://www.dropbox.com/scl/fo/fsqtm4hqt6wdvn9tqd2e6/AKrvAuvANwsKNrtFM_QCWcI?rlkey=8bfmg31fpn9n008s50l40s3m7&st=4llgz7b4&dl=0

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-Feel free to leave a comment, I really like to know what you guys think ^^

- Also what other series and/or characters would you guys to see more of?

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