Underside - an Undertale AU
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Ongoing5m
Last published Sun, Apr 5, 2026
Universes, infinite possibilities.
So what was this one called?
Underside.
A universe with unique properties and an infinite story.
A long time ago, there was a war between two races.
Monsters and humans.
On day, the humans sealed the monsters underground with a barrier that could only be broken by seven human souls, or a monster and a human.
That is the story that many have been told.
Yet one human falls into the Underground, one who's SOUL does not possess the magic inside of her.
But she can earn her trait, if she can escape the Underground.
This AU is mine! DO NOT REPOST OR STEAL!
Undertale is owned/created by Toby Fox!
All Rights Reserved
#338
papyrus
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