Undyne: (Spoken) I knew [bad word] here, human. They all did… and they all fell.

(Sung)
With the seventh human soul, our world will be transformed,
Now, you stand, facing me, in the eye of the storm…

(Spoken)
But first, human, let me tell you the tragic tale of our people. It all started, long ago… No, you know what? [bad word] IT! Why should I tell that story WHEN YOU'RE ABOUT TO DIE?

(Music starts)
NGAAAAAH!

(Sung)
 [bad word] a time when
hero must make a choice
Fighting with honor, make
All rivals fear my voice

Tonight, this battle will
Make all the monsters say,
“Undyne has saved us all,
Undyne brought back the day!”

Real heroes never fear
Real heroes laugh at death
Every soldier must fight
Until their final breath!

I dedicate my life
To upholding what's right
Serving my land and king
BRING VICTORY TONIGHT!

 [bad word] 
Bring victory tonight! [bad word] on and do what's right,
Go, Undyne, fight!

Undyne:
I forged my destiny from my blood and my sweat
If there's one who can beat me, I haven't met them yet!
You'll never win, little child, this is my destiny,
They will sing of my name in the pages of history!

 [bad word]  Fight on, Undyne!
Undyne: Raise my spear to the sky!
 [bad word]  Fight on, Undyne!
Undyne: Loyal soldier keep marching on!
 [bad word]  Fight on, Undyne!
Undyne: We shout with one voice!
 [bad word]  Fight on, Undyne!
Undyne: We will carry on!

You stand in the way of all our hopes and dreams
If human history has taught me anything
It's that humans will fight, it's that humans are tough,
But from what I have seen, you're made of softer stuff

 [bad word]  Fight on, Undyne!
Undyne: Stand until the end!
 [bad word]  Fight on, Undyne!
Undyne: Because someone has to die!
 [bad word]  Fight on, Undyne!
Undyne: Clash as you pretend!
 [bad word]  Fight on, Undyne!
Undyne: The bloodstains will dry!

Undyne: The very fact you exist is a crime
But you're not going to escape, no, not this time
If your life stands between us and seeing the sky,
Then tough luck for you, human, tonight you're gonna die!

I feel everyone's hearts as they're pounding in sync
Pushing determination to the very brink!
With our hearts and our souls, we all know we can't fail,
 [bad word] on, little human, let's end this sorry tale!

Undyne and [bad word] 
I feel everyone's hearts as they're pounding in sync
Pushing determination to the very brink!
With our hearts and our souls, we all know we can't fail,
 [bad word] on, little human, let's end this sorry tale!

(FIGHT!) Is that all you've got?
(FIGHT!) I've nothing to fear!
(FIGHT!) You are a disease!
(FIGHT!) I'm justice's spear!

(FIGHT!) You cannot fool me!
(FIGHT!) You're sick in the head!
(FIGHT!) We'd all be happy
(FIGHT!) If you were dead

(FIGHT!) 'Til your dying breath!
(FIGHT!) For the ones who've gone!
(FIGHT!) For our noble cause!
(FIGHT!) We will carry on!

(FIGHT!) We will find a home!
(FIGHT!) We'll escape the wild!
(FIGHT!) We will see the dawn!
(FIGHT!) Farewell, human child!

Real heroes never fear
Real heroes laugh at death
Every soldier must fight
Until their final breath!

I dedicate my life
To upholding what's right
Serving my land and king
BRING VICTORY TONIGHT!

 [bad word] 
Bring victory tonight! [bad word] on and do what's right,
Go, Undyne, fight!

Undyne:
I know in my heart there's no path but to fight
I know in my heart I am doing what's right,
It'll be different this time, we will win this war
The humans will know fury like never before!

 [bad word]  Fight on, Undyne!
Undyne: Raise my spear to the sky!
 [bad word]  Fight on, Undyne!
Undyne: Loyal soldier keep marching on!
 [bad word]  Fight on, Undyne!
Undyne: We shout with one voice!
 [bad word]  Fight on, Undyne!
Undyne: We will carry on!

Undyne:
There were six came before you, six humans who tried
To get past the royal guard, every one of them died
I will never accept your mercy, never be spared,
Killing you is my mercy, so stop being scared!

 [bad word]  Fight on, Undyne!
Undyne: Stand until the end!
 [bad word]  Fight on, Undyne!
Undyne: Because someone has to die!
 [bad word]  Fight on, Undyne!
Undyne: Clash as you pretend!
 [bad word]  Fight on, Undyne!
Undyne: The bloodstains will dry!

 [bad word]  We believe, Undyne, that you're doing what's right, [bad word] on, then, Undyne, you must finish the fight!
Your heart, Undyne, should be telling you what's right,
You can't let a human live, you must finish the fight!

Undyne and [bad word]  [bad word] on, Undyne, stop the bloodshed tonight,
What's good is a hero if they will not fight?
Follow your heart, and you will do what's right,
You [bad word] away this time, let us finish the fight!

Undyne:
 [bad word]  human, [bad word] back and fight,
I will rip out your soul and I'll bring back the light!
You can't give me mercy, can't handle my might,
Though you flee to the heat, you will not leave my sight!

Undyne and [bad word] 
(FIGHT!) 'Til your dying breath!
(FIGHT!) For the ones who've gone!
(FIGHT!) For our noble cause!
(FIGHT!) We will carry on!

(FIGHT!) We will find a home!
(FIGHT!) We'll escape the wild!
(FIGHT!) We will see the dawn!
(FIGHT!) Farewell, human child!

(FIGHT!) Get back here, you punk!
(FIGHT!) Don't you disappear!
(FIGHT!) This is the last time-
(FIGHT!) Hey, get back here!

(FIGHT!) Ah man, all this heat…
(FIGHT!) I'm just feeling beat…
(FIGHT!) I need a drink…
(FIGHT!) Can't stay on my feet...

 [bad word]  Undyne, don't give up the fight!

(Adapted from Radix Music)