A portal opens up in the middle of Snowdin out of nowhere, where the christmas tree once stood. crackling with static electricity, no-one knows where it lead, if it even lead anywhere...
In truth, it lead not to a place, but to a time. Specifically, mere hours before the first attacks by humans, the start of the war.
Note: It's most likely I'll only accept old time RPers, as I don't like to read messy text or 3 word replies.