The Tale Which "Must" Be Followed
The Prophecy Which Whispers Among The Shadows The Prophecy Foretold by Time and Space The Prophecy of DELTARUNE
What is It?
This theory-analysis-thingy exists on the understanding that the Prophecy was written (So not a completely arbitrary "Cosmic Law" that manifested from nowhere) and unless we believe to be a seperate "Angel" Character, I believe we can say that it was written by Gaster (It is HIS DELTARUNE after all), so let's explore on the ramifications of such a thing.
Let's start with the simplest thing, if the Prophecy was Written It means that it was created for a Purpose. The Prophecy is after all a metatextual parallel to very "Story" of Deltarune as a game and so from there it must have an Author.
But unlike Toby Fox, Gaster would make zero sense to have created his "Story" for the same reasons, DELTARUNE doesn't exist as a piece of entertainment and WE do not exist as its audience within the game. It is important to remember that despite how much of an unstoppable force we are depicted as, We are not the center of this World, We are not even the most interesting one in it. It doesn't exist to Serve or Appease us, rather we were invited for a Purpose by none other but Gaster himself
"A NEW FUTURE", at first glance may be viewed as Gaster inviting us to create a new future by shattering the one decreed by the Prophecy but I think the exact opposite.
The Prophecy IS the New Future, it is not something that can exist without us, and therefore did not exist before us. It is YOUR POWER after all that seals the fountains and banishes away the Dark. On a more direct example though, if The Red SOUL refuses to continue and Gives Up on the world, Gaster has these words to say to us:
We did it, gang!! We shattered the Prophecy... It was infact this easy this entire time.
What Gaster is very likely referring to is the Roaring, the end of the World. The Sky is covered in Darkness, Titans rise from the fountains, the earth draws her last breath and everyone dies.
This is what we were invited to Stop from occurring, we are not a rogue element thrown in by Gaster in his "experiment" to break the grip of the Prophecy upon this world, but rather the key to making this very Prophecy become a Reality - Not as its enforcer mind you, but rather it's fuel and engine.
Ralsei; The "Soft" Enforcement
From there a lot of things begin to make sense in my eyes as to the weird nature of the Prophecy, specifically Ralsei's strange relationship with it.
Ever since Chapter 1, they have been the Guide and "Soft" Enforcer of the Prophecy, guiding the Fun Gang through this adventure, revealing the Prophecy to them and even in certain instances outright telling them that they should act the part expected of them.
Although obviously not out of wishing to exert control over the others.. Ralsei is literally telling Susie to not be so mean to people and be someone that'd want to actually save the world. I would never do Ralsei dirty like that. :3
But nonetheless, Ralsei - whether they like it or not - is a being made with the entirety of the prophecy stuffed into their little brain, they exist as a Tool and Agent of the Prophecy and by extension its "Author" to softly enforce the Prophecy as the guide and info-giver of the group to make sure they stay on path and not do anything Dumb.
Ralsei should naturally then be the most Pro-Prophecy character in the group AND YET in chapter 4 we learn the exact opposite, as they confess how terrified they are of the Prophecy and how much it hurts them to know all of these things, no less going into borderline panic attacks when it comes to Susie learning the Final Tragedy.
To which they outright speak of a desire to change the prophecy. So what gives? How can Ralsei be both Enforcer AND attempting to undermine the Prophecy?
To that, I believe this gets directly called out in Flowery and Ralsei's "fight" in chapter 5.
This seems to be a perfect example for the aforementioned "Then The World Was Covered in Darkness", of the consequences of refusing or failing to follow the Prophecy.
To Ralsei the Prophecy isn't an Iron Fist having already decreed everything they are going to do before they do it, rather it is the only path they are able to tread that does not lead to everyone's and everything's Doom.
Which MAY seem like an inconsequential difference - in the end when your only choices is to follow the Prophecy or die, there is No Choice. But this also means that "defeating" the Final Tragedy by way of attempting to actively rebel against the Prophecy is a really bad idea, because if Chapter 4's visual representation of the Prophecy Panels as Glass has made anything clear...
It is that the Prophecy is a Fragile Thing. Yes, it is a solid and hard thing, but if you break one part of it, the entire thing shatters and falls apart, you cannot pick and choose with it.
And as the consequences of it not being followed to the letter have been made clear... This makes actually undermining the Prophecy's unsavory parts, a terribly difficult endeavor.
The Roaring Knight; The "Hard" Enforcement
Flipping on the exact opposite side of the Spectrum, who is the most Pro-Prophecy Character in the entire story? The Character SO integral to its continued stability that their removal would instantly make fulfilling the Prophecy outright impossible?
That of course, is the Roaring Knight (And by extension Kris as their little squire), literal Herald and Instigating Event that marks the very beginning of the Story and Prophecy.
If it wasn't around, there'd be no Dark Fountains. No Dark Fountains, No Dark Worlds. No Dark Worlds, No Adventures. No Adventures, No Prophecized Events. No Prophecy, Then The World Was Covered in Darkness.
Case and point: Chapter 3's mere existence seems to be the direct product of attempting to make this specific prophecy come true.
The Roaring Gang (yes that's their name now), decides to make Kris' house the staging ground of the third dark world adventure.
In the Night between ch1-2 Kris plugs their TV back on, in seeming preparation for the Slumber Party with Susie that Kris is going to engineer by slashing said tires
And right before creating the Dark Fountain, Kris makes SURE to turn the TV back on, therefore giving life into their "Lord of Screens".
And additionally, because of said slashed tires and door they leave open, the Dark World also doubles as a lure for Undyne herself as part of their additional goal to kidnap the police for their "Sacrifice", whatever that may be for.
The Roaring Gang went all out of their way to make sure that the Prophecy was followed to the letter.
This I believe to be MAJOR as it completely flips the nature of the "Roaring" Knight on its head if it actively attempting to serve the very Prophecy that assures that the Roaring will be averted and the world saved.
Suddenly, I believe this instantly explains the GAPING mystery of why is Kris even assisting a being called "The Extinction-Apocalypse Knight" that Ralsei (and literally every single character in the story we've met) believes to be attempting to bring the Roaring to life and end the world...
Because the Knight is not attempting to achieve that, like we all saw it in chapter 4, that bastard literally summoned a GODDAMN TITAN on "seemingly" a whim.
If it wanted the Roaring it could've made Card World into a den of Titans to vaporize the weak and blatantly unprepared Heroes, or heck- just murder us in that same dark world itself.
It is literally characterized as a murder-machine that beats the crap out of us in ch3 instantly... And yet, It doesn't kill us.
All part of the intricate "Script" of the Prophecy. One in which it seems that Kris and whoever else is aiding the Knight's cause have pledged themselves to its Plan for the sake of Saving the Worlds.
Which in turn explains why Kris seems willing if not outright loyal with extreme actions such as letting their own dad be kidnapped in ch5 and even then almost tear away the code to make Susie reaching the shelter to save Asgore an impossibility had they not been so slow..
For not doing this means that EVERYONE they know and love will perish should the prophecy not be followed.
And the Knight's role seems to go far more than merely an Agent to keep Us in check, the Black Knife, an item so integral to its identity that its OST and Prophecy Panel mention It, is a Weapon that Specifically exists to Slay Titan-Spawn.
It allows Kris to do Ten Times the Damage they usually do on their own and they only have a shard of the whole Knife, what would an objectively ridiculously powerful being with the ENTIRE Black Knife do against a full-fledged Titan?
The Roaring Knight is a Being Custom-Made to Fight Against the Roaring, not bring it about.
The Knight is the main line of defense in ensuring that everything goes according to the Prophesy's Instructions. The Knight IS the Prophecy in that to vanquish one, you need to vanquish the other and the Knight has continuously been depicted as Insurmountable. Even We, for all of Our Power and Mastery over Time cannot truly defeat it in chapter 3, nor could Flowery in chapter 5.
And so, with all the pieces together, let's ask the most important question.
The Prophecy is Instructions. But Instructions for What?
There's a certain Paradox going on with the Knight being Pro-Prophecy, that being what is the Prophecy even attempting to solve then?
If The Roaring Knight is the individual that will inevitably cause the Roaring... In its attempt to ensure that the Prophecy which exists as a Solution to the Roaring brought about the Knight and the Knight is making the Prophecy come true which exists as a response to it existing...
. . . .
Suffice to say this makes no goddamn sense. If we take this at face value, it means that the Prophecy is solving a problem that it creates. Why not just get rid of the Knight or make it not create any Fountains and therefore the WORLD IS SAVED! Without any roaring, nor prophecy nor final tragedy!
Certainly saves everyone a lot of trouble I think, including the Knight.
I think we need to accept - by virtue of the Knight being Pro-Prophecy being kinda nonnegotiable - that this requires a second plot twist!
That the Roaring happens independent of the Roaring Knight's actions. That even if we managed to outright killed it in chapter 3, the Roaring would still arrive and Then The World Was Covered in Darkness.
THANKFULLY- We already got the evidence for such a thing! :}
In the Panel for the Light World and the Depths, it is described as an "Eternal Night which Grew", the phrasing implying that the Depths were not a static thing that came into being all at once, but rather an ocean of darkness that grew into existence for seemingly as long as the world itself has existed.
Things such as the nature of the depths and how it grows and from what (if anything) are a whole other can of worms.. But the important thing is that It presents the Depths as something that has been growing since time begun. Of course we don't know if it grew and then stopped, so let's look some more!
Going back to the very grandfather of revealing the existence of the Depths in chapter 1 - Jevil - He directly describes the Depths as bubbling over in the form of a "Roar of Hell" a Roaring if you may.
Our first ever mention of the Eternal Night beneath the world and it's spoken in a way that's ready to burst at any moment.
And in direct contrast, we have Flowery, our newest and most recent direct confirmation of the existence of the Depths themselves and his warning is all about the fact that darkness is infact stirring and the simple fact this is a warning implies that Flowery is telling everyone that the Depths will soon ERUPT.
So.
A Sea of Endless Night that has grown since the world existed unendinlyg, until it has finally reached a breaking point in pressure. Now the Sea is stirring and ready to bubble over and burst in the form of the Roaring.
THIS I believe is what ACTUALLY causes the Roaring and the End of the World, not someone stabbing the ground 4-5 times in the comfort of their own home and keeping it hidden for a few days, but rather the millennia of built up darkness contained in the very belly of the World having nowhere else to go but up, and cataclysmically burst through the Earth itself and flood the world in darkness.
An inevitable event, dependent on no single person's effort or actions. It will happen no matter what and given that it seems to be something that has been going on for millenia, I believe this explains why the Prophecy itself is also this ancient in nature.
For THIS is what it is attempting to stop.
The Tale Which Must Be Followed
And now, with everything in place, Let us end this.
The Author who wrote the Instructions to Saving the World.
The Knight which Makes It come true with Blackened Knife.
The Prince guiding and instructing the heroes in following along.
The Darkness beneath the world ready to burst out should all fail.
This, I believe is why the Religion of Deltarune exists for, not as a crude Vanity Project for Gaster to have his ego stroked, but rather more akin to a literal Atomic Priesthood, the Religion exists for the sole purpose of keeping the knowledge of the Prophecy safe and maintained by being directly injected into the Culture and Faith of Hometown so that everyone is passing on the Tale for generations for when the time comes.
And the times HAS come, the parties that have become aware of this have the already preserved records of the Prophecy to figure out how to save the world from the impending apocalypse.
Soo....
Why DON'T we know that? I mean we know the Prophecy but We nor the characters know the REAL nature of the Prophecy within this point in the story.
Why is the Knight acting in such antagonistic ways to the Fun Gang?
Why is Ralsei showcasing a lack of awareness of the Knight also acting to save the worlds through the Prophecy?
Why is Kris' alliance to the Knight even kept hidden?
Why are they even doing all of these SILLY ADVENTURES when the Earth is about to explode?!
I think... It's because this is all part of the point of the Prophecy. The Prophecy is a Tale - A Story and stories need their Heroes and their Villain.
The Nature of the Prophecy isn't to follow a Sterile "Procedure" and set of steps that leads to the World being saved akin to defusing a bomb.
The Prophecy is a Script for a Story, one meticulously crafted and built to result in ALL of these adventures so far so that the Heroes of Legend become Stronger and gain the courage, growth, skills and expertise that only such manner of adventures can create.
The Prophecy doesn't want its Heroes to be Calculated "Professionals" with a job to do, it wants them to be capable of attuning their emotions, of harboring deep passion and beliefs within them and being united in their bonds of one another in both friendship and love.
THAT is how the Worlds are Saved and THAT is why they are being deceived in this artificially curated adventure to create such a bond between all two three of them.
Ralsei's knowledge was after all artificially planted within their mind, nothing stopping from certain parts missing.
Ralsei has been completely denied knowledge on the Creation and Background of the Knight and given their Purpose is to inform the Fun Gang based on the Prophecy... This is knowledge that they should NOT know about.
The Roaring Knight exists to create an immediate threat that the Heroes need to chase after to seal the Fountains, organically forcing them to to fight and befriend their way through all of these magical Dark Worlds in which they learn important lessons of Friendship and growing as people while also becoming capable warriors that become stronger yet stronger with each passing Chapter.
Chapter 4's Dark World was just that, the Knight literally lured them under false pretenses of attempting to Kidnap Toriel and then spends the entire Dark World doing NOTHING other than kicking the Heroes around and wasting their time as they are forced to journey throughout the Church Dark World... And learn of the complete Prophecy while attempting to reach it.
Culminating with the Knight finishes off the entire adventure by summoning a Titan and then Leaving the Heroes to Fight it and Learn the mechanics and nature of a Titan and its Spawn before ultimately learning HOW to defeat them.
The ch4 Titan is literally the perfect controlled environment in all the important ways
It is freshly hatched and therefore at its Weakest
Its Spawns have JUST begun to emerge and in its fight are being Purified almost as quickly as they spew out by the Red SOUL, not having any time to amass into an unstoppable force like earlier in the Second Sanctuary
It is ONLY one Titan.
Gerson is also "coincidentally" in this very Dark World to help them in the Third Act in figuring out how to defeat it.
This entire fight was a Lesson perfectly masked under the guise of the Roaring Knight being an Evil Baddie that wanted to kill the gang and "Proof" of it wishing to bring about the Roaring.
All part of the story that will result in the Heroes of the Prophecy becoming who they MUST be in order to Save the World from the Darkness.
All part of the instructions given to them.
All bonds, All laughs, All tears, All smiles, All suffering, All pain, All tragedy, All Hopes and All Dreams. With them all in place,










