Prologue: Death of a dynasty

Approximately 66,000,000 BC

It was after the event that would be known as the Chicxulub Impact.

At the time though, it was simply called The Great Fall in the ancient tongue. A fitting name, for other than the literal sense, the event also marks the greatest, and perhaps most devastating downfall of the Natural Order that life on Earth have ever experienced ever since the very Genesis of the planet itself.

For you see, the miracle of Life as it is on this planet started it course from a very early stage, ancient beyond humanly imaginable and complex beyond mortal comprehension. Pulling itself together from the primordial sea of creation somewhere around 4.41 billions years ago, the course of life has given rise to the most mighty yet tragic beasts that have ever walked the Earth, millions of years before the existence of any Man, Phantasmal Species or even Divine Spirits.

These lifeforms, were more well known as the Dinosaurs.

'Terrible Lizard' was what humans named them as, though not entirely accurate -for they are more avian than saurian- it carries the point all across: They are terrifying prehistoric beast, savage, crude but efficient, cunning but unintelligent.

But of all the things they thought they know about these beast, humanity -as they always did- still made a mistake.

The unrelenting flow of time waits for nothing and no one, drowning all in it's everlasting flow, and naturally those that had been lost in it can never be recovered.

And consequently, such things also includes all the traceable evidence that show that: Yes, these beast are still savage, crude, efficient, cunning. But they are definitely not unintelligent.

Though running on a primitive mindset, driven madly by instinct, and maybe not even qualified as an civilization. They are still indeed self-aware, capable of complex thoughts, showing familial bonds, forming mutually beneficial cross-species group. Traits that clearly belongs to a sentience existence, and traits that they were taken for granted for.

But Humanity probably will never know about that.

And as such, they will never know the truth about what really happened to these supposedly mindless prehistoric beast, the struggles they went through, the hardship they faced, the sacrifices they made,...

But most importantly, they will never know about the war they fought in, and the enemy they went against.

It began at the end of the Cretaceous Period, an extraterrestrial civilization arrived at the solar system after eons of intergalactic travel. And it was from there that they came across what they dubbed 'The Blue Planet', now commonly known as Earth.

Desperate and sliding down the razor's edge of extinction, the outsiders hardened their hearts and made the morally questionable decision to 'kill' the planet and make a habitable world out of it's corpse. Using their knowledge, technology and experience in dealing with conscious planets. They immediately spent all of their remaining resources to discreetly project a field of effect empowered by their own logic around the planet, thus effectively isolating it out of the entire timeline.

And thus the completion of phase one, performed without obstruction.

By the time the will of the planet -Gaia- itself discovered the threat. It was already too late, as it was already cut off from the standard means to defend itself. And without access to the higher functions of the Counter Force, the entire Earth was what the Humans may call a sitting duck. Practically helpless to prevent the foreign beings from furthering their process of literally draining the very essence of 'Life' out of it.

But that have nothing to say about it's countless children though.

The extraterrestrial, in their assurance of superiority have also made made a singularly big mistake: They never took in account other forces of resistance.

In this case, it was the Dinosaurs. The original Beasts of Gaia -or Beasts Ø as they were dubbed, though being nowhere nearly as individually strong as the ones that will later bear the title. But what they lacked in raw power, they more made up for it with sheer ferocity and uncountable hordes, and to them, that is more than enough.

So, with only strengths and experiences obtained solely in a world were only the strongest survives, the Dinosaur waged war against the Aliens. A war that will never be recorded in the history books, where the only thing standing between the total annihilation of life as it was known were the savage prehistoric beasts which were much more intelligent than humanity could ever have imagined.

However, the odds were not in their favor. In fact, calling it staggering would be an understatement. The Invaders, with technology so advanced they manage to outlive their own home planet and more, were what one could call a God when brought to comparison. In estimate, each and every single one individuals of the outer species would be able to bring down at least ten of thousands of their kin both big and small.

But it didn't matter, to them, Invaders were Invaders. Their enemies were only twenty five thousands strong while they themselves were countless, so it matters not. What does is that their world, their life and the life that would come was threatened, and as such, they responded in the only way they knew how: They fought; with claw and teeth, with tail and horns, with rage and honor.

Disregarding of their own safety or any self-preservation, they threw themselves at the enemies by the millions if that means reducing their numbers by one digit. Whenever they can not do so directly, they hid away into the most obscure corners of the planet, using their knowledge of the land for their advantage. With the Earth itself being their ally -both literally and metaphorically- by helping whenever it could.

Using what might be known as a mockery of modern day guerrilla warfare, they took away little by painstakingly little of what they could from the enemy overwhelming forces.

The losses were insurmountable, they kept on fighting.

The battle rages on for what seems to be eternity, yet they kept on fighting.

The chances of victory were next to none, and still do they persist, for that glimmer of a impossible end.

But yet, at the end of it all, after hundred billions of sacrifices, countless more battles, and never-ending bloodshed, they finally attained that ever seemingly unachievable victory.

In one final gamble, the natives had with all they possible might, launched the greatest attack consisting of at least several billions of their number, aimed at the heart of their enemy. With the outcome that almost didn't came to pass being the total annihilation of the Aliens.

But even then, it was with a heavy price.

A price that can be seen clearly by one, amidst a wasteland that was once a pristine ancient forest. But now at it's place were where the ground lay barren and devoid of life, the sky covered by a thick blanket of molten ash like the rest of the planet, the air borderlining on toxic, and the embers of both burning flora and fauna alike floated lazily in the scorching winds.

The Great Fall, was that ultimate price.

To take that final victory, and ensure the future of life on Earth, the only chance the Dinosaurs got would be to detonate the main power reactor of the alien's spacecraft. Thus virtually wiping them both out of the face of the existence, and only leaving in it's wake a meager five percent of all life standing, most of which being microbial. A truly laughable number, considering the billions and billions of species that once flourished on this planet. And that number will only continue to decline in the following half a million years.

And as stated, it was an extremely flawed gamble, a gamble that gave away everything, a gamble that doesn't even ensure success if won. But as soon as it was presented, they took it anyways, and without hesitation.

For is it not what the older generation do? To make sure at absolutely any price that the following ones have the best chance they have to thrive?

That is what they fought for, the continuation of Life's course. Throughout the entirety War, the only objective of their respective species was only to ensure the future of their youngs.

And for that, he is grateful of his comrades.

In the aforementioned wasteland of The Great Fall aftermath, a figure still stood to rise above ashes.

Towering at almost eight metre in height, even though this being was on his last leg, he still managed to stand firm and unwavering as he always have been.

As he was the leader of his kin as well as their strongest warrior, One Eye.

Now, even though he may collapse in any given moment, his mind was currently occupied with something else, namely: His hatchling.

For if One Eye had anything able to be identified as regret, it would be not being able to protect his other hatchlings and now leaving his last remaining one to fend for himself in a no longer suitable world, a world that will not welcome them.

But then, he quickly shook that thought out, he also have confidence in his little one after all.

He -so as every single one that have fallen- did absolutely all they could as parents, now it is up to his and each and every other following generation to live on and change to world in their own way.

So with that musing over with, and every ounce of strength left, he cleared his mind to perform a familiar set of motion: Posture high, stepping one foot in front, inhaling in the burning ashen air-

And he roared.

It was not a sound of anguish, nor the wild declaration of an apex predator, but the the parting sound of the previous generation, a wish good luck for the ones that will come, a final farewell of a father, that in itself does not carries any more intensity than any of the two previous, yet it possess power all the same. A mere fragment of the strength in his prime, a dying breath used for something else. But even then, the roar of the tyrant it still undeniably is.

The ground beneath him trembled with the sound wave. The thick sheen of ash around him teared itself apart as it met with the might of his roar.

And just for a short insignificant moment, the cloud of molten ash blocking out the sunlight part their way to reveal the finally unobstructed sky above, the sky that they all fought so hard to clear.

But then, as the sound of his last intended declaration to the world gradually faded away into the silent distance, along with it came his consciousness. As the white overcame him, an unaccounted stray thought made it's way through the mind of the mighty Tyrannosaurus.

'It would be nice to have a second chance to properly take care of a hatchling of his own.'

...

And so, the age of the Dinosaurs came to an end. With the death of it's greatest hero somewhere in the Eurasia Continent.

Even if this cursed body of his may never truly find it's rest in the embrace of the motherland.

A/N:

Hello you beautiful peoples. This is The Indominator and this is my first ever try at fanfiction. So I do please hope you'll be gentle with me.

As you probably see, this is an Fate/Stay Night fanfic, but with a twist. The Heroic Spirit I've chosen is very unlikely, a dinosaur. I've nursed this Idea for quite some time now, and after reading one of Corvus no Genmu's amazing piece 'From Across the Throne of Heroes', I finally decided to take up the pen and do this myself. I also asked for his permission to use some of his story elements, and he had graciously allowed it.

The character One Eye is taken from Grant Morrison and Barry Sonnenfeld's 'Dinosaurs vs Aliens' comic, published by Liquid Comics and therefore does not belong to me, or any F/SN character for that matter, it belongs to TYPE-Moon. In short, I own nothing.

For those of you who have read 'Dinosaurs vs Aliens', you can see that I've decided to do some little tweaking to the story, namely interpreting it in my own way as the comic is not yet finished, basically creating an AU (ok so maybe not as little as i though but you get the idea). As well as giving the alien a massive boost in power to match Nasuverse's standard for extraterrestrials. Seriously Nasu, what's up with the super ludicrously powered aliens?

This is only a prologue, future chapters will be longer, I hope.

As for servant stats and master, you'll have to wait and see, though I've given some clues about the latter, so a cookie for whoever figures it out.

Also I'm not an Type-Moon expert, so please correct me if i got anything wrong. But do note that this is a fanfic so some rules will still be bended, just not too much.

So plz Follow, Favorite and Review, constructive criticism is welcomed with open arms but no flames if possible.

Chapter was revised as of 5/7/2018

Yours sincerely

The Indominator