This question goes out to... Well, any stage of Gaster willing to answer, I suppose. I hope it's not too forward of me but... how did you get the holes in your hands? (Sorry if someone has already asked this as well...)
A shadow passes over Gasterās features at the question and he bows his head, thinking.
āI suppose⦠that it wonāt hurt to tell the story now. ā He seems to be talking more to himself. My research has long since been destroyed as it should have been, so there is no chance of anyone recreating my workā¦ā
After a long while he looks up at the child and sighs.
āWhen I was younger⦠much younger, and we were all stuck in the Underground⦠after the Core was completed, my sights set on the barrier and an attempt to break it without having to collect more human souls.ā
He looks into the distance, not really seeing, his voice growing soft, āKilling the human children that fell down⦠was breaking the King.
āSo I did somethingā¦ā He took a deep breath,Ā āWell, it was unethicalāunthinkable, actually. I⦠cut away the bone in my hands and used the pieces as raw material for the forms I hoped to create. I⦠my hope had been to create vessels for the royal childrenās souls; to revive them somehowā and you have to understand, Asgore never knew of this. He still doesnāt knowā¦ā Gaster closed his eyes, āHe must never know. I donāt know how he would reactā¦ā
He seems to lose his train of thought and shakes his head, āBut, ah⦠as you can guess, my calculations didnāt anticipate the final outcome.
āI was blinded, I think⦠by my need to help the king, for a way to keep the Underground together, because monsters were quickly losing Hope.
āWhat happened, however, was that⦠I suppose it was putting too much of my own magic into the process, but⦠instead of just creating vessels, I created two new Souls as well as the bodies⦠and they became my two boys; Sans and Papyrus.ā
Finally, Gaster is smiling,Ā āAnd although my soul was irreversibly cracked in the process, I would never give them up for anything in this universe or the next.ā