A thing where the souls of monsters can combine with humans.
If mine were to mix with Sans,"we'd"probably win an award for being the laziest M0F0,&people would be Scr3wed if this was gen0cide mode. #RUU #RUUDoodled(CauseThisIsProbablyNonsense) #Undertale(ish,WellIGuessThisIsAnAU-Thing) #Sanita(Well,its sounds better than Ritans)