The Nightmare: Event Boss

so I guess ima make this cuz I can't find any thing about this in yt.

* The Nightmare is a Boss map that is Night version of The Surface and spawns Nightmare Gaster, Giganta Corrupt and Nightmare Corrupt

* Giganta Corrupts have 300hp and weild a giant red knife

* Nightmare Corrupts have 333 hp and weild purple knives

* Nightmare Gaster: The strongest and most powerful, has 6500+ hp and is I guess a nightmarish version of True gaster. His attacks can glitch you out, breaking you

How to defeat
From what i saw and Others said, you have to take out the minions as soon as possible before gaster spawns or they will make the battle just way harder.

* Try standing still to apparently glitch out Gaster so he can't move and then start attacking him

Drops and others
Win: 1000+ XP (gotta check)

Music playing: Nyxtheshield GlitchTale Dreemurrs United

This is tottaly different from The Surface event