he's being nice to you so you be nice to him or you'll die so don't be disrespectful don't hurt him and don't hurt the studio or his friends

You killed everyone papyrus toriel alphys and now you're here in the end staring death and determination in the face

Bill cipher is a chaotic 2-D dream demon from the Second Dimension who destroyed his own dimension and is here to take over ours and then all of the others and wants to make a deal with you to posses you and start weirdmagendon