Now, as I've stated before, I generally do not take suggestions. And yet, while I was publishing the initial chapters of my Potterverse/Fate/Grand Order story Zabaniya, meemapmeow made a remark that I would probably do a Harry/Tiamat story once I played through the Babylonia Singularity in that game. It's taken some time to get the right story, which in some regards is not dissimilar to Zabaniya. But instead of showing Harry coming home after being part of Chaldea, this story will be closer to a reimagining of the Babylonia Singularity, helped in part by the anime adaptation of said Singularity. That, and Psychoghost's A Mother's Love, which I recommend, as it helped shape how I characterised Tiamat.

Keep in mind, though, I'm not going to be publishing the full fic any time soon. I want to binge watch the whole anime adaptation first. I do intend to write the first few chapters, set in the months prior to Chaldea sending their Masters to Babylonia, but I'll sit on them until that point. However, I also intend for this fic, should I make it that far, to extend at least to the Solomon Singularity.

Also, keep in mind that this is not the only story idea I have going. I have a few other Nasuverse crossovers in the works...as well as a couple of Potterverse crossovers with Berserk...and Final Fantasy XV. I'm sure the latter has more than a few of you excited, and I have some interesting plans for that one.

In any case, enjoy...

PRIMORDIAL SONG

CHAPTER 1:

WELCOME TO THE JUNGLE

"Bloody jungle. I mean, I'm not an expert on Ancient Mesopotamia, but I thought they didn't have jungles in the Middle East. Am I wrong? I mean, you're the nearest thing I have to a biologist here."

"Aaa?"

"Of course you don't know. But it's not natural, is it?"

"Laaa..."

"Good, so it isn't just me. Too hot, too humid, and…GAH! Mosquitoes! Seriously…I mean, I know malaria and who knows what else these mosquitoes are carrying are a bit of a lesser concern than, well, just about everything else, but still…how are you holding up?"

"…Laaa"

"…I'm sorry. And with what that robe-wearing blinged-out bastard did to you…I'm sorry. I really am."

"…Aaaa."

"…Thanks. I'm sorry he took away so much of your powers and gave it to the part of you that was more…amenable to his plan. But thanks for protecting me. That means a lot. Most people expected me to try and protect them. It's nice to be on the receiving end for a change. And especially given your history."

" Laaa! Laaa!"

"You're welcome. The problem is, we're in the middle of a jungle, somewhere in the arse-end of Mesopotamia, it's over four thousand years into my past, I think, given what that robed prick was saying, and I don't think we can get any more food or supplies from that other robed prick. You know, the one who was helpful anyway. I mean…he called that place the Reverse Side of the World."

"…Laaa."

"What? You like it here? Even though that robed prick stole your powers and split you in two? Because you're more or less free?"

"Laaaa!"

"…Yeah, I know that feeling. I've told you the details of my life. At least I got out of it. You, though…well, at least one of us is happy. Well, happier than she was."

"Laa."

These two voices, one speaking a language foreign to these parts, the other singing, were conspicuous by their difference to the verdant landscape around them. Birdsong and the noises of exotic animals filled the humid, muggy air between the trees. It was like a jungle out of deepest, darkest Africa, though anyone paying attention to the flora and fauna would have recognised species that should have been in Central and South America.

Into a clearing pushed a pair of figures, both conspicuous and out of place, albeit to differing degrees. The one taking the lead was a young man in his twenties, a messy thatch of dark hair framing intense and pensive features. Emerald eyes flashed behind glasses, his face was covered in stubble, and a faded scar, like a lightning bolt, was barely visible beneath his fringe. He wore rather ragged clothes that had clearly seen considerable repair.

The other figure was, if anything, even more extraordinary. At first glance, it appeared to be a woman, of indeterminate but young age, slender and buxom, her face inhumanly beautiful, albeit with a somewhat impassive but lugubrious expression. Then again, it was clear she wasn't human. Her hair was a pale, silvery blue, her eyes a dark pink with strange, cross-like lights glowing over the slitted pupils. Her ears were pointed. A strange, vaguely star-like symbol was tattooed around her navel. A long, draconic tail protruded from her derriere. Her modesty was barely preserved by scaly growths over her groin and her breasts. Finally, massive horns curled from her head.

The young man sighed. "I think we should make camp here for the night. My feet are sore, it's getting dark, and who knows how far away we are from any kind of civilisation."

The woman peered at him, before giving a little nod. She opened her mouth, and sang out a note. Oddly enough, any onlookers would have noted glimmerings of concern in the note, as well as her eyes. They would have also noted the fangs in her mouth, another mark of her inhumanity.

"Yeah, but I kept some of the stuff the other robed prick sent me in stasis. And if any wild animal comes along…well, I can handle it, in theory, and if I can't…" He looked meaningfully at the woman, who gave another small nod, before singing out another note. A question seemed to be in it.

"…I don't know. We need to find civilisation first. When you last checked, flying above the canopy, you thought you saw a temple of some kind in the distance. How much closer do you reckon we are?"

The woman sang out another note, looking down. With that, the young man walked over, and put a hand on her shoulder. "It's okay. Besides, flying above the canopy for too long might mean we get spotted, and we're not sure how people would react to you, even before they learn who you are. If we can do some surveillance on them first…especially if that robed prick is still around. The one who stole your powers, anyway. Anyway, let's eat."

The woman, for the first time, smiled. It was a small smile, and there was something somewhat wrong with it. Not malicious or anything, it just seemed alien on her face, as if she never had much cause to smile before. But the sentiment behind it was genuine, the young man knew, and the quiet note she sang was one of simple gratitude…

Harry Potter was never sure of what he had intended to do after Hogwarts, but while joining the Unspeakables was one possibility, he never dreamt it would lead to him ending up some time in the distant past, trapped within a different layer of existence. Then again, knowing his luck, it shouldn't have really surprised him. Further complicating matters was the entity currently tucking into the stew he had cooked, humming contentedly to herself. She didn't need to eat, as far as he knew. Rather, he cooked for her pleasure, to give her a new experience. Which was ironic, considering that she was, in many ways, the mother of all that existed.

Her name was Tiamat, a name he remembered from a book of mythology Hermione had once browbeaten him into reading. A mother goddess from Mesopotamian mythology. Harry was sure that, if Ron was present, he'd call Tiamat a MILF. Or maybe not, given the clearly inhuman and monstrous appearance of the entity. True, she was beautiful, but given that Harry had been part of a society that looked down on people for merely having the wrong heritage, horns, fangs and scales would have been a turnoff for many wizards.

It didn't help that, when they first met, there were…communications issues. Though it was less about her inability to speak any human language, and more to do with her mindset. The moment he saw Tiamat, or rather, the moment she saw him, she was afraid of him. Not to the point of running away per se, but rather, her songs became entreaties for the murderer to stay away, like the inverse of a Siren.

In truth, Tiamat was the first entity he had come across in what he later learned was the Reverse Side of the World to not be hostile, or at least not trying to attack him. And so, if only because he was hoping for conversation, he'd approached her in spite of her singing. True, he'd approached her like a skittish animal, trying to calm her down, but it managed to work.

It took a long time for them to come to enough of an understanding so that Harry could learn why she was so against his approach. The problem was not so much a language barrier as much as a psychological one. Tiamat had a ridiculously alien mindset. Harry didn't know how long it took for them to truly understand each other. Time passed strangely in the Reverse Side of the World.

Then again, time was what got him into that mess in the first place. It was remembering the Time-Turner that Hermione had used in their Third Year that had Harry deciding to join the Unspeakables. His secret goal was to find a way to travel far enough back in time to change the past, and thus the present, for the better. To ensure those who lived were those who deserved it, and those who died were the enemy.

Guilt and obsession drove him onwards. Hermione had discovered his secret project, and couldn't dissuade him, especially as she had to act as a liaison between the Unspeakables and the Magus Association, the governing body of a different subset of magic users. But the other Unspeakables cottoned onto what he was doing, and a confrontation ensued. A confrontation that ended with some highly experimental Time-Turners and similar devices destroyed, and Harry plunged back in time. How far back, he didn't know, but his only remotely human contact in the Reverse Side of the World, who claimed to be Merlin, claimed it was millennia into the past.

Anyway, the so-called Merlin had sent him food and supplies, though Harry had kept a wizarding tent and emergency supplies with him at all times, even in the Department of Mysteries. That had helped. Though Harry had to wonder if the rather effeminate, light blue-haired young man truly was Merlin.

In any case, he had ended up stranded in the Reverse Side of the World. And his only real company, aside from messages from the supposed Merlin, was THE Mother Goddess. One who, initially, wanted to love her children forever, but in a way that basically meant being a mother forever, not wanting her children to leave her embrace, so to speak. She was basically like Molly Weasley taken to a ridiculous extreme.

And yet, the two got to speaking. And Harry, gradually, over time, changed her, or at least he hoped he got through to her. She at least seemed to be thinking, and their conversations turned to other matters. Harry had told her of his life, and she listened, out of curiosity. He liked to think that they had become friends, of a bizarre sort. Her usual impassive sorrow seemed to give way, albeit subtly, to other emotions.

And then, HE came.

The man identified himself to Harry as Solomon, the King of Magi. A man with tanned skin, white hair, clad in robes and with rings adorning each finger, who came to visit Tiamat many times. But when he eavesdropped on a conversation between Tiamat and the thing that claimed to be Solomon, he learned that the entity was actually not Solomon at all, but rather, Solomon's legacy. A gestalt of the Demon Pillars whose powers Solomon had harnessed in life, known as Goetia, Beast I. With Tiamat being, he claimed, a fellow Beast of Calamity, Beast II.

Harry had intervened, and Goetia had forced Tiamat to make a choice. Tiamat attacked Goetia, much to Harry and Goetia's mutual surprise, but Goetia recovered surprisingly quickly, tearing Tiamat in two, somehow, splitting off the part of her that wished to help Harry, and discarding them into the Singularity he had been creating out of spite.

Leading to this point, after they ended up in this jungle. From what he had gathered, Tiamat only had a fraction of her powers, the lion's share going to the part of her Goetia was using as a catspaw. Oh, she was still powerful, but she was no longer on the same level she was before.

Harry didn't realise that Tiamat finished her meal until she nudged the bowl into his hands. His own was empty. He looked up into her eyes, and smiled. "Thanks. You enjoyed that?"

Merlin had told him that the reason why he could understand Tiamat was that, somehow, the deity was speaking in a primal form of Parseltongue. When she spoke, he could hear a simultaneous song, and her words, albeit sliding into his head. Yes. Thank you, she sang.

"You're welcome."

She then sat down next to him. Her tail curled around him a little. She looked into the sky. I have not seen this world for so long, she sang softly. Will they accept me? Their fear of me, I smell it on the wind…they care little that I fear them.

"I don't know. But…you're no monster. Monsters wouldn't change like you did. Besides, you tried to help me when Goetia attacked. If you really wished to go along with that monster's plan, you would have left me to die, or worse."

She hummed, but there were no words, just a simple noise she made in thought. A beautiful, musical thing, but a simple noise all the same. He gently reached over and clasped her clawed hand gently in his own, trying not to let his gaze linger on her too much. She didn't look at him, but her gentle squeeze told him all he needed to know, that she appreciated the gesture. He'd come to feel affection for the Beast next to him if nothing else, though that was probably a function of how she was pretty much the only person (even if that was by a rather loose definition of the term 'person') he had spoken to for what felt like years.

Suddenly, she tensed, and sang, albeit quietly, Something approaches. It has the feel of a Servant…and divinity.

Before Harry could react, something leapt out of the nearby foliage. "What a cat-astrophe!" the interloper yelped. "My nose caught a whiff of an a-meow-zingly purrfect meal, but when I got there, it's no longer here! I'm not feline happy!"

Harry stared flatly at the interloper, who was, well strange. True, he was travelling with a woman who looked part-dragon, but the interloper was still very strange. It appeared to be a young Oriental woman with short light brown hair framing attractive if mischievous features. The odd part (aside from an Oriental woman being in what was meant to be ancient Mesopotamia) was, well, three odd parts. One, she seemed to have a pair of cat ears on her head. Two, she was dressed in what appeared to be a tiger onesie. Three, she seemed to be holding a staff with a large cat's paw on it.

Still, Tiamat had stated that this woman was a Servant, and one with an element of divinity at that, so he said, "And who are you?"

"I'm glad you asked!" the woman said. "I'm the Jaguar Warrior, lord of the jungle! And I'm pretty paw-sitive that you two are trespassing on my boss' domain. So, unless you want me to be furry-ous, I'm gonna have to ask you guys to come with me."

Harry looked over to Tiamat, who, after a moment, gave him a nod. Harry then said, "Just gimme a moment to pack up…and then, well, take me to your leader." He then winced. "…I thought it'd sound cool when I was saying it…"

CHAPTER 1 ANNOTATIONS:

So, there you have it. Harry's travelling with basically the Jekyll of everyone's favourite Kaiju MILF through the Babylonia Singularity. And we've had a Wild Taiga show up.

No numbered annotations this time.