BATSHIT INSANE DELTARUNE THEORY IāM JUST FIRING FROM THE HIP HERE
GENERAL SPOILERS FOR THE WHOLE GAME SO FAR
WHAT IF TEAM KNIGHTāS PLAN IS TO TRAIN THE SOUL TO BE STRONG ENOUGH TO BANISH THE KNIGHTāS (AKA DESS) DARKNESS?
Okay, okay, okay, so Chapter 4 revealed that the Soul is considered necessary in some way by Team Knight.
Side note: I will not be calling Kris a victim in any way, shape, or form. Even before I thought of this theory, the circumstances pointed to Kris willingly taking on the Soul for the purposes of their plan. The phone call at the end reveals that they are being coerced in some way, but I believe that thereās a lot more willingness on Krisā end than most people believe.
Now, the biggest question in the air after that is what exactly is the Soul needed for. The phone call itself doesnāt imply all too much, other than the fact that the Soul is needed for something Kris can do within the dark world.
So, we turn to what exactly the Soul is capable of thus far.
The most notable thing that weāve seen the Soul do is banish darkness, whether itās sealing a dark fountain, or banishing the darkness, Titan spawn, or the Titan through brilliant light.
This theory is based on another assumption/theory that the Knight itself is at least, partly feral at this point. In its intro, you can see itās drooling, which probably means that whoever the knight is, theyāre at the very least, not all there upstairs.
This is in spite of its seeming intelligence and consciousness, as seen in how the Knight laughs at Susieās face when she tries to threaten her, and even shows off during its attacks and moves. The most obvious one is most certainly when it posed while floating all the way up the stairs during the final confrontation of the first dark world in Chapter 4.
What can we determine from this?
Well, my proposal, is that Dess (sheās the knight for this theory) is corrupted somehow. Corrupted by the darkness in some way, which is somewhat supported by the fact that sheās the Shadow Crystal boss of Chapter 3. The fact that her weapon drops both the Black Shard and the Shadow Crystal seems to imply that they themselves are made out of the material, at the very least equipment-wise. If the Shadow Crystal on its own is capable of corrupting othersā minds like Spamton and Jevil, imagine if you were encased in armor made up of the same material.
Back to the original theory, thereās a clear progression in the Fun Gangās strength due to the sealing of Dark Fountains. This includes the Soul, which I donāt personally believe would have been able to purify the Titan if it were back in Chapter 1.
I believe Team Knightās plan is to cultivate the Soul within Kris, to strengthen it enough to be able to banish a specific kind of darkness. The darkness of the mind that the Shadow Crystal inflicted on Dess. This ties back to the supposed promise that Kris is being coerced with.
I donāt actually believe Kris to be a wholly unwilling participant of Team Knight. They may have grown to be less willing due to their growing friendship with Susie and her newfound resolve to oppose the Knight, and the fact that this meant that they were on opposite sides, but I believe they still have that determination towards Team Knightās goal that Kris promised. A promise that I believe goes something like,
āI promise, we WILL cure Dess. No matter what.ā