This is what you came for (RWBY x Undertale Reader)

Dust yourself off

*at Ospin's office*

Ospin: so who are you exactly?

(Y/N): call me Asterisk and I'm from out of town and was wondering if I could have a place to stay for now.

Ospin: well perhaps we can make an arrangement, Mrs. Rose told me about your skill so how about-

Gaster: He's going to ask us to join his school

Ospin: you join my school and then I will let you stay here for now

Gaster: called it, this writer is lazy

(Well I'm sorry that I want to skip to the cool stuff!)

Gaster: just sayin

(Y/N): (who are you talking too?)

Gaster: nobody important

(HEY!)

(Y/N): very well so how do I join your school?

Ospin: come this way and you will take the initiation test

*Time skip Brought to you by chibi Ospin explaining the rules of the initiation*

Ospin: so you got all that?

(Y/N): yes

Gaster: no!

Ospin: very well then lets get started

Gaster: I don't know about thi-

(Y/N) and gaster are both then launched in the air and fall towards the forest and (Y/N) then creates some stairs from bone pillars and walks to the ground

Gaster: if I still could I would have puked

Then a bunch of grim surround them

(Y/N): I'm going to try to get this done faster so I don't have time for this right now

(Y/N) then summons his gaster hands and fires them all together and wipes out all the grim in his path and makes his way to the next objective

*Time skip brought to you by chibi lazy author arguing with chibi Gaster* 

*Ruby's POV*

I walk in to see Asterisk blasting all the grim on the monitors and doing pretty well

Ruby: Woah! he's doing great

Ospin: yes at this rate he is going to set a new record

Then Ospin gets a call

Ospin: yes wha-....I'm on my way

ruby notices something is wrong

Ruby: what's going on?

Ospin: something's come up and it could be trouble so I need to go now!

after Ospin leaves ruby goes back to watching the monitors

Ruby: I hope Asterisk will be ok

*(Y/N)'s POV*

I walk into the building and find the chess pieces I was told about

Gaster: lets pick the king

(Y/N): nah I feel like picking the knight

I then pick the black night and head out

Gaster: well fine if you really want to-

Then both me and gaster freeze when we sense something

Gaster: do you feel that

(Y/N): I sure do

Then a purple beam of energy almost hits me but I'm barely able to doge it then I look up to see who shot that