The Killer

Warning: Dreammare, if you don't like, don't read. Art is not mine!! Undertale is not mine or any of the Au's!! I only own the plot line, kinda!!

This just started just an idea, then I made it into something, sooo, here you go!
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Nightmare lived on the Earth for a long, long time, he's seen it all, but when an outbreak that causes humans scientists to go after young skeletons. Nightmare can't help but be pissed!