???

this story starts underground, after the core overloaded and caused a major change throughout the underground, corrupting the elements within, not even the monsters could avoid it, all except one, but even he didn't end up unchanged, for his mind was twisted, and it's unknown whether he plans to actually destroy the barrier, or just experiment to his soul's content, you will have to wait an see...

this is my second book, which is about a universe i made, kind of, it mostly revolves around the gaster here and his experiments, the original gaster is owned by toby fox, this version of gaster and his experiments are made by me

btw just so no one freaks out that i might be stealing a drawing from someone else, I'm not, unless you call using your own art stealing