Halloween has come to the surface and the underground but when Mettaton opens up a coffin containing a robot vampire, it's up to Frisk, Asriel, and their friends to save everyone. Can they stake the robot before it takes over both worlds? Or is it lights out? Rated T for slight language and implied themes in later chapters. Pairings AsrielxFrisk, MettatonxOC, NOS4A2xOC NO LEMON!