Undertale: When All Things Become One, the World Calls Me God

(Undertale fan fiction + Hell’s Poem fan fiction + transmigration + no System) Overnight, Chen Xiao finds himself as William, who has just teleported to the Blank Forbidden Zone with Jacob (Infected Sans). Watching Jacob beg for mercy, Chen Xiao does what William would have done and completely destroys him... Afterward, William appears in a soul-like state. Chen Xiao persuades him to stay inside his body and promises to fulfill his long-held wish... King of the Multiverse: “Well, what brings you here?” Alpha: “Brother, so you’re still alive.” Justice Error: “Teacher, don’t you dare die before me!” Omnipotent: “I’m not like 404 or Alpha.” Geno: “Teacher, I support your plan.” 404: “When all things become one, the world shall call that day the coming of our God!”