"ERR... GASTER WAS... A PERSON! I THINK! MY APOLOGIES, I'VE ONLY HEARD OF HIM FROM MY BROTHER'S OCCASIONAL RAMBLINGS OF VARIOUS TIMESPACE SCIENCE SHENANIGANS, AND HE RARELY PUTS ANY EFFORT INTO THEM. OR ANYTHING ELSE, IN FACT! IF I REMEMBER CORRECTLY, THOUGH..."
Papyrus pauses to collect his thoughts for a moment.
"IF I REMEMBER CORRECTLY, HE WAS, ER... DOCTOR W. D. GASTER, AT ONE POINT THE ROYAL SCIENTIST OF KING ASGORE DREEMURR! HE IS THE ONE WHO INVENTED THE CORE, THE UNDERGROUND'S MAIN SOURCE OF POWER, BUT I BELIEVE SANS MENTIONED AT ONE POINT THAT HE WAS ALSO STUDYING TIMESPACE... AS WELL AS...
SOME SORT OF VOID WHICH EXISTS BEYOND EVEN THAT!
Papyrus is beginning to sound a lot more sure of what he's saying, somehow; like it's all coming back to him.
"HE FOUND BEYOND TIME AND SPACE A VOID OF INFINITE DARKNESS, WHICH ACTIVELY CONSUMED LIGHT, AND DISCOVERED MANY CREATURES WHICH EXIST WITHIN IT. AMONG THEM WAS THE SKULL YOU JUST SAW, INITIALLY DUBBED THE PHANTOM PAIN FOR THE FACT THAT THEY GAIN ENERGY FROM MEMORIES WHICH HOLD EMOTIONAL PAIN..."
Papyrus is beginning to lose is usual jovial tone of voice.
"Not long after he had developed a method to call one out and bargain for it to attack in exchange for sharing the caster's own pain, he met an unfortunate end. He fell into one of his own creations, designed to interface with the void, and was shattered across time and space. After that he became little more than...
Than a nightmate."