not a monster, but an encounter I read about here sometime ago.
I wrote most of it down to use as an encounter myself.>Greedy bastard fakes being a priest of any faith.>wants to collect tithes, offerings and shit from peasant folk>proceeds to convert and or otherwise con the people into some legit faith>people cant get to afterlife>all of the dead townspeople, as ghosts or worse appear during nights significant to the faith>Usually in the church/chapel/mosque whatever to pray>they try to find their way to afterlife>are not aggressive until they witness their holy place looted, or behaviour concidered not to be pious>if the person/party weathering the night in said holy place encounters them, if they manage to wait out the night and pray, they're fine
however>this mass of souls can fuck spacetime>one night might last for several days in the affected area>the souls of the dead hope to be taken to afterlife by their deity after these shows of piousness
They dont need a building to appear, any holy places such as islands, rock formations, waterfalls etc will do.
And the more there are, the stronger they are, imagine Orc WAAAGH.
Legit holy relics of the faith calm them down not to appear. If relic is moved, they are bloodthirsty as hell, and can follow the relic to get it back during the night.
Also a legit priest of said faith can send them off into afterlife.
Usually, if faith says creatures like flies, spiders, scorpions, snakes or even plants, etc are of the devil, the usually abandoned holy property is surrounded by their dead carcasses to a various distance depending how many souls there is lingering around as the earliest warning of its existence.>some player races could work here too
I have tried to work this into an encounter, but its a bit too out of the blue to be anything other than a quest element.
I have tried to write this into a horror segment, but I dont have necessary horror talent for it.