Unhallowed Depths [Undertale AU]

[Requested by @Iceprince234x]

"Legend has it that long, long ago, two races ruled over the earth..."

Frisk and his colleagues were sent on a mission to investigate Mount Ebott after another group of children were reported missing. Despite the rumours, none of them believed that there existed a different, more advanced race residing in the mountains. But once they actually go beneath the surface, missing children weren't the only thing they found that day. And it was completely different from what they have had in mind.

With what they have uncovered, Frisk found himself starting to question the liability of humans - of the people whom he once trusted in...
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BOOK I of II
Date started: 13th March 2024