I was struck by inspiration today, and thought of a name that more effectively conveys what my AU is. So, from this point forwards, the AU will now be called Undertomb. The reason for this is because i was trying to give the AU a style more similar to one of those old dungeon crawler games. So unfortunately that means I'll have to start over with the battle sprites I've been working on, as this AU would use a different artstyke than undertale. And those new battle sprites will take longer to make as I'll have to make them from scratch. I'll also be changing the synopsis of this AU to fit this new mental image. The good news is; now that I have a clear theme, I can start working in environments as well!
Edit: turns out Undertomb is taken. Along with tombtale, undercrypt, and dungeontale. So I'm going with the only name left: Crypttale.