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// The chapter that will be replaced 
// Story: Replacements 
// by ForeverCaseInPoint 
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The mane six, in their new power straight from the mysterious box, 
caught up to the villainous Tirek. He blasts them, but it did nothing. 

"How is this possible? You have no magic!"

Having stolen alicorn, earth pony, unicorn, pegasus, and Discord's magic, 
Tirek has no problem foreseeing the future in no time at all. 
Yes, he has no way of defeating the mane six or stealing their new power, 
but what comes after his inevitable defeat surprised him. 

"You're wrong Tirek!"

The destroyed Golden Oaks tree will be replaced by a castle made just for Twilight. 
And that's not all at all. As Celestia's pawn/student/whatever 
she calls Twilight Sparkle the unicorn, that unicorn has her fair share of replacing things, 
and being replaced by the Twilight he knows didn't change that unless said change 
does it better. Yes, The Twilight he knows is the replacement of another Twilight: 
Twilight Sparkle the unicorn. 

The Twilight he knows "reformed" a unicorn villain named 
Sunset Shimmer almost immediately after. Tirek never thought there are villains in pony kind. 
And Twilight wants to keep her "reformed", 
even so much as to hold back in the face of Dazzlings. 
Yet they will never know Sunset Shimmer's villainous plan has succeeded: 
raising an army to take over Equestria. How that happened, Tirek prefers to keep secret. 
It all happened where the mirror portal takes those who enter it. 
Humans are what Sunset calls those who are born there. 

It will not be so long after his defeat that everything will be replaced anyway, 
in the most effective and stealthiest way he could conceive: changing the past. 
It will be all thanks to a unicorn who so happens to be Twilight's next enemy to "reform", 
the same unicorn who will replace an entire race of changelings with a changeling traitor 
not long after, the same unicorn who will meet Sunset Shimmer and have at least a tour of 
human land through a portal that will replace the one that Sunset Shimmer once knew. 

Tempest Shadow is another unicorn Twilight "reforms" on her journey through a plenty of 
new creatures that forshadow the future of this time, 
because the storm king betrayed that unicorn in ways that make Tirek's mistakes. 

Then Twilight has a traumatic experience with Cozy Glow while a bunch of 
new random race creatures are off to defeat Cozy Glow. 
And this is what Tirek managed to gather in this foresight, what will happen is immeasurable, 
however he saw enough to know his history will continue to repeat itself. 

"I may have given you my alicorn magic,..."

And then, the "final" nail in the coffin, the Tree Of Harmony and the Elements Of Harmony, 
the very things Celestia used to end her enemies and start all of this in the first place, 
destroyed and replaced by whatever new place made just for those unknown new creatures to 
live in. This does not end here. All of this will be replaced by yet more new things that 
share the same fate with the very things they replaced and it runs on. 
Replacers replaced by replacers, a cycle of replacement. 
This can happen all it wants, even beyond this existence. 
It doesn't matter what happens in Equestria, everything will be replaced by whatever 
Sunset Shimmer visited through that portal. 

An entire race that replaced his kind will be replaced in the same manner 
and they will never know it will have happened to them, 
even in their end, without surrendering to the very thing they used to defeat his kind, 
friendship, because they never think it can be stolen or used against them 
thanks to everyone in Equestria that failed to do so. Yes, no amount of helping or ending 
ponies will change that. All of that help will be part of friendship, 
their present friend but future traitor and far more of a traitor 
than his brother could ever be countless times over.  

Beyond that is told only exactly when it happens, for who knows what will replace humans. 
Their creations? Some other things whether in their world or somewhere else? 
Everything destroyed on it's own will perhaps? There is no real answer until they happen, 
just as it did with his once existing kind and him. 
And being replaced by humans is the future most in favor of ponies. 
But Equestria as he knows it ends at his defeat. 
From then on, he may as well dream for the rest of his life 
because anything goes as far as he's concerned. 

Celestia doomed everything before Tirek get's his chance(s). 
Maybe this is why Discord is reformed. He let himself be reformed knowing this will happen. 
Maybe this is what his brother wanted, a traitor for reasons completely different to 
his claims. Tirek failed to do anything about it despite his efforts. It being the fact 
there is no hero thanks to her, and everything and everyone is a villain 
and therefore victims, all of them stuck in their own point of view about who's a hero, 
villain, and/or victim. It being the fact all will be replaced and will end. 

An entire Twilight Sparkle relegated to the past tense, and so will countless other things living or not. 
Isn't that destroying Equestria a piece at a time, only to replace it with their own, like he's doing? 
They may have stopped him from making his own world, 
but they may as well not have stopped him at all, 
even if he does as they expected him to do in the face of defeat. 
And speaking of what they expected him to do, and being "reasonable", 
there must be a reason Celestia put him in Tartarus instead of ending his life. 
Yes. This is the time to listen to what she was saying now that his defeat is certain. 
Ah yes. She expected him to change his mind and be reformed, helping her kind called ponies, 
becoming what his brother has become, a traitor to his kind. For all Tirek knows, 
he has no way to not betray his kind anymore, or what's left of it. 

Of course, because of his now dead brother, Tirek is the last of his kind 
about to be replaced by those so called "friendly" beings but actually reformed versions 
of his kind who call themselves called ponies. He has no choice. 
And now, Tirek is done underestimating them. 
If they didn't want that world they've been telling him to make it's their fault and 
it's the price they'll pay for all they will do, are doing, and have done as well as 
what they did to him, his kind, and everything else. 

"...but I carry within me the most powerful magic of all!"

He destroys everything with all he's got, 
in every way conceivable to him and all the power he managed to steal, 
by starting with his closest target: Equestria. 
Equestria, past, present, future, sun, moon, nature, life, ponies, 
even everything inconceivable is destroyed. As he predicted, 
the power that destroyed everything did nothing to the mane six's new power. 
The mane six defeated him, however his task is already complete. 
The mane six thinks their new power brought everything back, 
but it instead replaced everything with new everything. 

The replacement first noticeable to Twilight is her tree replaced by a castle. 
The second is Spike has wings. 
The third is a cave replaced by some crystal plant tree house hybrid. 
But it's not long before she finds out everything's changed, 
save the fate of Equestria still depends on her, 
yet what depends on her is a new Equestria with a lot of her actions she missed out. 
This no one knew anymore, not even Twilight. 
Their knowledge is replaced. The canon is preserved. 

In some time past the end. 
"Surely you've seen this coming?" asked some new thing. 
"I didn't. I really didn't." cried Celestia. 

All of this story will be replaced soon and so will canon so don't worry yourselves, and bop it.