Insanity! Sans

Sans was experimented on by Dr. W.D. Gaster, who attempted to set monsters free from the underground by taking the DETERMINATION of from a human soul and finding a way to safely inject it into monsters. through several experiments of trial and error, Sans was the first patient to not undergo amalgamation. this led to him moving to the second phase of the project; honing the power of DT. he was able to learn the functions of the SAVE file and was shown how DT influenced his magic, through asgore's trainee royal guardswomen, Undyne. over several months, these sessions became less frequent, with Sans slowly becoming more isolated. small thoughts of why Gaster had left him isolated for so long turned into resentment for him, as he grew more determined to find out why. this spiralled into a violent killing spree, lost from its' original goal.