By MG_Morgan MGMusic160 YouTube MGMorgan YouTube Spotify Spotify Apple Music Apple Music.
Released 9/13/2025.
Duration: 7:18.

Listen on YouTube, Spotify, or Apple Music.

Read artist commentary.
Read crediting sources.

Tracks that PENUMBRA PHANTASM references:

• Penumbra Phantasm by Toby Fox
• GUARDIAN by Toby Fox
• THE HOLY by Toby Fox
• THE WORLD REVOLVING by Toby Fox
• Don't Forget by Laura Shigihara
• Black Knife by Toby Fox
• MEGALOVANIA by Toby Fox
• Dark Sanctuary by Toby Fox
• My Castle Town by Toby Fox
• Lost Girl by Toby Fox
• The Legend by Toby Fox
• His Theme by Toby Fox
• Gaster's Theme by Toby Fox

Added to wiki 12/8/2025.

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Artist commentary for PENUMBRA PHANTASM:

MG_Morgan ✑ YouTube description

Yes, the actual video sucks. I had no ideas -_-

Most of you may know that Penumbra Phantasm, an unreleased Toby Fox song originally composed for Homestuck, is NOT* coming to Deltarune. Well... I think it almost definitely is! The main reason? The name is too cool to not use. ;)
(Jokes aside, it makes perfect sense, and there's literally already that motif in THE HOLY that works as the perfect replacement...)

Working on this song, I wanted to include motifs that actually meant something and worked contextually in the game. We don't know much about the Roaring right now, but it's probably gonna end up happening around the end of Chapter 7, and that's basically what I aimed for the song to be for. Whatever happens, this song is almost certainly going to be played somewhere important, and so I wanted to include the most important, central motifs to the game and the prophecy - THE HOLY, Don't Forget, Dark Sanctuary, GUARDIAN, The Legend, to name a few. And, obviously, the Penumbra Phantasm ones, or as close as I could get, anyway.

But yeah. I know the mastering isn't perfect, and there's definitely room for improvement here and there, but I'm pretty happy with the finished product!

I hope you enjoy :D

(And, happy 10th anniversary, UNDERTALE!)

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Timestamps:
00:00 - introduction
01:25 - looping section
07:00 - end of song
(from 1:25 to the end of the song would be the loop, I only wrote it like this to not mess up the timestamps with what's below)

-- Motif Guide --

(🟩: Easy to hear, 🟨: Listen a bit closer, 🟥: Subtle)
[PS: Don't Forget is scattered everywhere in the song, so I haven't listed it, nor have I listed most repeats of any motifs]

🟩 0:01 - That one bell part of GUARDIAN at the end, replacement for Doctor in the Homestuck version of the song
🟩 0:34 - THE HOLY motif at the end, replacement for Saviour of the Waking World (I think?) in the Homestuck version of the song
🟨 1:42 - Original melody, BUT has the freedom motif at the start
🟩 1:51 - THE HOLY
🟩 2:17 - Black Knife / Roaring Knight theme
🟥 2:17 - MEGALOVANIA chord progression (if that even counts...)
🟩 2:25 - Dark Sanctuary
🟩 2:50 - Castle Town
🟨 2:55 - Lost Girl (in the guitars)
🟩 3:59 - THE HOLY
🟨 4:08 - Start Menu (hi-hats)
5:14 - Original melody, replacing that other bit in the Homestuck version
🟩 5:20 - The Legend
🟥 6:01 - His Theme (bells)
🟩 6:15 - That one part of GUARDIAN
🟨 6:43 - Gaster's Theme

Created using Ableton Live 11 Lite
Thanks to surreal's cover that I listened to a ton of times before making this lol

Crediting sources for PENUMBRA PHANTASM: Crediting sources for PENUMBRA PHANTASM…

MG_Morgan ✑ YouTube description

Credits:
'Penumbra Phantasm' originally by Toby Fox
DELTARUNE and UNDERTALE by Toby Fox
This song/remix is by me, MG_Morgan