song by marchewa 
thumbnail from the original upload
undertale and deltarune by toby fox

for those who are confused this is supposed to be a undertale secret boss theme like jevil and spamton neo  

marchewa
https://on.soundcloud.com/FnWca

[UNDERTALE UST] CALL ME INSANE (reupload)

* Seems you've been caught in my web, ahuhuhu!~
* And just in time for the tea party! I've invited some special guests...
* ... who'd love to have a taste of some human-flavored pastries! Ahuhuhuhuhu!~
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I pretty much stuck the motifs on top of the original Spider Dance, might redo it in the future. Hopefully my next mashup will be more interesting than this...
SEWN IMPASSE/Mantlekeeper belongs to https://soundcloud.com/dr-fansong-thing
GOLDEN HOUR/Solis belongs to Marineflames
RELEASE THE OUTBREAK/Antoinette belongs to @creepabotinc
JOLLY JOYRIDE/Lustrelocks belongs to @hog-ridaaah

Thumbnail by Marineflames!!!
Music by Toby Fox, additions by me

[Purple Soul Mashup] Spider Rune

[GSO Reupload] THE REVERIE OF SHATTERED HOPE (Arrangement)

original by https://soundcloud.com/notrealnevereal
https://soundcloud.com/notrealnevereal/yo-buddy

Think about it! No one has ever made an AU. Where?
Vocals by Zootus_

Thumbnail: https://twitter.com/serif0S/status/1571950273819443207

YO BUDDY

*Some melodies write themselves...

Keyara is the secret boss of a possible Deltarune Chapter set in the hospital. Keyara is the piano that Kris used to play. Her name is a combination of "Keyboard" and "Chiara". She uses the purple soul.

 ➤ Video: https://youtu.be/2bFqejNRo3g
 ➤ MIDI Download: https://drive.google.com/drive/folders/1ZHzPsyKu7WkPpW7k84MEE8kAHaAEx8Bw?usp=drive_link
➤ Drawing made by Dantak: https://www.instagram.com/dantak.art/

Midnight Minuet (Vs. Keyara) - Deltarune Secret Boss

The daring and bombastic party host of The RETROSPHERE, always with a grin on his face and a song up his sleeve.

Song by @retroleaves

♪ Tenna Fazbear

*Hey, "Kris."
*...
*You had fun?
*Hm...
*No answer?
*That's fine.
*...

*So, i have a question.
*Not to Kris...
*But to YOU.
*The "Angel" thats supposed to be "helping us".
*...
*What are you gonna gain from this?

*...
*Quit ignoring me.

*...
*Quit telling me to run away Kris.
*There's no way in hell that im letting MY best friend
*be controlled by WHATEVER that is.
*And especially not if they're doing all this...

*Well... lets do it then.
*Sorry Kris...
*Guess your face had to be bitten in the end. (Heheh, they're snickering.)

*Kick my ass.
*ACT - CHECK
*Susie - My best friend.

DELTARUNE Chapter 7 UST // MEGALOVANIA // Fanmade

PENUMBRA PHANTASM (Pending Update)

(I DO NOT OWN ANY OF THIS)

Song by Glazko
Sprite Animation by Kittblush

(Do note, this track is just a PLACEHOLDER and will be taken down once the owner of the song officially uploads it here)


YouTube link: https://youtu.be/-SGRlkpIPzM?si=kItXrxNiSq3da9yc

[Deltarune Fan-Track - Wallace Vandlous + Dullbozer] DULLBOZO

original by @jamangar https://soundcloud.com/jamangar/deadringer

all my flps: https://soundcloud.com/very-skilled-gamer/flp-dump

big thanke you to @karolkpusta for the AWESOME art that is too good for a mediocre track like thiss (plus alot of feedback while making this)

DEAD RINGER (+FLP)

Made in FL Studio 2025 with the YMCK Magical 8bit plug2.
Started: May 28, 2025.
Time spent: 4h33m.

Sunken Whirlwind

Currently uploading at https://soundcloud.com/creepa-bot-2nc

Hi. I do music stuff, but some of the tracks were made by others, that I uploaded with their permission. I also own an AU called Animated Stories, a take on Painted Plummet. The OST account can be found at https://soundcloud.com/painted-plummet-two

I also have a Deltaswap take called Puredawns: https://soundcloud.com/puredawns-ost-4real

If you like the stuff here, go check out the magnificent musicians that made some of them:
@dashingtoadie-the-sequel
@megalolazing
@lucky-g-70017210

[Purple Soul Mashup] Spider Rune

Creepa-Bot Inc.