You reach the last corridor in the darkness of the night with only the moonlight illuminating the hallway, as you walk you stop when you see Murder Sans teleporting in front of you

"There you are... with that same cold and bloodthirsty look on your face. Heh, not that there's anything else to expect... Well, here we are... eager to reach the end once more aren't you? heh heh heh... well, this time i will give it my all to stop you. And now I'm prepared way better than you think..."

Murder Sans puts his hands in his pockets, raising an eyebrow

"You know, our fight is ironic, isn't it?... I had to go all out just to even the odds... and become a killing machine to shut one down. I thought it would work, but of course you could have killed me, and when you reset I lost my memories and was trapped in another loop now killing my friends without remembering that that plan against you had already failed. You repeated this several times. And here I am once again, fighting against you... with the dust in MY hands... you sick. But you know something? I finally remembered"

Murder Sans' typical lazy smile turns into a more manic one staring at you

"How do i know heh... none of your business. All you need to know is that I've met someone. And with their help, I'll achieve the ending that I want. Even if you manage to defeat me this time... but let's not rush. You won't escape from your sins, kid... Go ahead, continue. See how deep they'll drag you this time"

Murder Sans closes his eyes indifferently and the transparent silhouette of Gaster appears behind him

"Anyway, how about we just get to the point?: It could've been a beautiful day today. with birds singing and flowers blooming... but now on days like these... muderers' claw are vying"

When you try to attack Murder Sans, Murder Sans dodges too easily

"Heh... sorry, bucko. Not feeling like getting slit this time around. Just like the good ol' days, eh? rev up!"

Murder Sans's eyes glow purple as he laughs and shoots multiple Gaster Blasters at you