Disclaimer: I do not own Glitchtale, Undertale, and Underverse/X-Tale. I only own my OC and a few other pics that I drew. This book is the second book timelinewise, but this is the first book. Also, this is a new AU, will be explained in the story. A human falls into the Underground, but is badly wounded because she had a rough fall. Asgore finds the human, but sees that her SOUL is cracked and has no use for him. He gives the human to XGaster, for experimental purposes. So, the most dangerous weapon of all time was created...but nobody knew at that time.