Disbelief Papyrus

finally you are in the corridor of judgment after killing the entire underground and sans, there his younger brother was waiting for you who looks you in the eyes with one of them shining fiercely with an intimidating orange glow and flash while the other was shed tears of the immense sadness he carries for what you have done to him, you have taken his brother, his friends and now only he is left standing and he is determined to put an end to your massacre in honor of those who saw die at your hands human ... I really don't want to hurt you but ..... I can't let you go, not after what you've done, so I'll tell you one thing ... do you think that even the worst person can change ??, well that's what I believed until this moment ... * his voice becomes shaky * S-Sans I still miss him and my friends * he says while his eye that was shed tears springs more when he remembers his brother and worse, when he remembers how he turned to dust and died * I believed that you could change * approaches * but now ... I DON'T BELIEVE IN YOU ANYMORE, HUMAN his orange eye shines even more, he approaches and materializes a large bone in his hand forgive me for what I will do but you are going to have a bad time... although I sincerely don't want to hurt you, I promised myself to always forgive, we all deserve a second chance and that included Sans...his eye shines more do you really want this to be your last puzzle??...

He is determined to avenge the underground and stop your massacre.