Hammer of Justice (soundtrack)

Hammer of Justice

Statistics

Track #

58 (Chapters 3+4 OST)

Length

2:13

Leitmotifs

THE WORLD REVOLVING, Gerson Boom, Ruins, Undyne

Author

Toby Fox

Japanese title

正義の槌 (seigi no tsuchi, "Hammer of Justice")

Filename

ch4_extra_boss

Location(s) played

Battle against the Hammer of Justice

BPM

160 (0:00–0:58, 1:25–2:13)
154 (0:59–1:24)

Key

C minor (0:00–1:50)
E-flat major (1:50–2:13)

Time signature

4/4

Media

Music guide
Previous track	Next track
Piano that may not be played that well	12am

Did you ever hear that old tale?
Yes, the old tale, based upon the prophecy...
Lord of the Hammer.

Hammer of Justice, Chapter 4

Hammer of Justice is the 58th track of the DELTARUNE Chapters 3+4 OST. It plays during Susie's battle with the Hammer of Justice.

Creation and development

Toby Fox first started composing this track in early 2016, and created a piano sketch that includes everything besides the last section with the THE WORLD REVOLVING motif, before resuming work on it seven years later.^[1]

Trivia

The track's title, along with the presence of Undyne-related leitmotifs, references Spear of Justice from Undertale.

References

↑ ..."Hammer of Justice" is another song I started making right at the beginning of 2016... but since I didn't create it for seven years... — CHAPTER 3 and 4 LOOK BACK!, Undertale/Deltarune Newsletter (Toby Fox, December 18, 2025.) toby.fangamer.com.

[1] ..."Hammer of Justice" is another song I started making right at the beginning of 2016... but since I didn't create it for seven years... — CHAPTER 3 and 4 LOOK BACK!, Undertale/Deltarune Newsletter (Toby Fox, December 18, 2025.) toby.fangamer.com.

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