u/NLiLox

Overall concept and my memory of it is pretty generic, I can't remember if the group are ghost hunters or stupid teens, and I think it's one of those where they all get picked off one by one. but there is one specific scene that I remember:

There was a metal, rusted door on the floor that opened up to some kind of septic tank (possibly could've just been really old water), and one of the people entered it and I'm pretty sure they died in it. I also think the lore behind it was that it was used to torture prisoners.

We all agree that the main thing Jiaoqiu needs from his novaflare is healing, to let him slot in as the sustain in both Acheron and DoT teams. However his technique is a field dimension, and in DoT, Hysilens also has a field dimension. A key thing I think his novaflare should include, that I don't see fanmade novaflares include, would be changing his technique from a field dimension to a buff, so it doesn't conflict with Hysilens's field dimension, especially if they buff it to activate his ult at the start of combat.