undertrap(papyrus)(you can make au version of him if you want)

Description: papyrus used to be like any normal papyrus,until the "disaster" sans was talking about and someone named "alphys" falling into the core,papyrus attempted to tell sans that sans was making things up again only to be nearly killed by a bone strike to his soul,confused and scared,he ran to gasters lab,where he explained his story while on the table resting from his wound,and gaster realized that he now had a oppertenty to test something that only existed in his notes,no one knows what went on inside the lab,or what happened when papyrus entered asgores castle,in the end,when papyrus returned to snowdin,he was now captian of the royal guard and when undyne attempted to help the KINDNESS human,papyrus attempted to kill her and when sans attempted to block the blow,sans lost his right eye and almost his life,but he managed to escape along with undyne,leaving papyrus to swear death to his former teacher and his brother,papyrus is even more ruthless then underfell papyrus,and he becomes ever so more insane as time goes on,he is one of the most powerful monsters in the underground and he can use giant gaster blasters and bones,in the netrual run,hes cracked soul is fixed by sans as he dies and when he realizes he killed his own brother for nothing,he finally snapped completely and goes on a killing spree across snowdin,waterfall,and hotland to find any "traiters to the king",dusting them to gain more and more LV as he tears his way thru the underground,when you finally meet him,he destroys your mercy button,leaving you no choice but to kill him,but he is hard in this fight as he now has LV:15 and the red lined scars on the left side of his head now glows purple and red and his hit point damage which usally does 20 damage now does 30 damage,so you better kill some monsters yourself before papyrus does,in the pacifist run,sans fixs papyruses soul without dying and papyrus realizes he was being controlled by gaster as part of gasters plan and sets off with frisk,undyne,and sans,not only to help the human escape,but to confront the true mastermind behind his and his brothers suffering and end his plan before it comes to furtian,and in the genocide run,he is the final boss and he fights harder in any of the routes before,sending waves of attacks and now having the power of karmic RB,he evetally melts into a massive amalgamate that loses interstet in fighting you and walks off to finally melt into nothiness,but not before absorbing gaster in his amalgamate form in the aftermath of the genocide route and finally dying in peace,this is his genocide route theme:https://soundcloud.com/dreem_team/the-last-stand