Spooky DnD One-Shot Adventure - Spooky

The characters are working for the local ruler hunting a criminal.
It is at an asylum for the insane which gives nightmares to any who try to sleep there.
There are hooded slaad cultists worshipping many-eyed creatures. And there is a charismatic werewolf seeking to slay everyone by dawn.
At some point an npc betrays the characters.
As the adventure progresses signs of an apocalypse manifest

The characters are a novice group of adventurers looking after the place for a night. A character is being hunted by a monster.
It is at a derelict inn which was the site of several murders.
There are a variety of kobolds, sprites and other small-sized creatures, scavenging what they can. And an imp seeks suitable servants for its patron.
At some point a drunk friend of a character arrives.
As the adventure progresses stars in the sky start to disappear

The characters are friends and family of an adventurer, gathered for a funeral. Two of the characters have fallen in love.
It is at a cursed lighthouse which is where a crystal chalice was crafted by the black demon.
There are a family of mimics who have recently moved in. And an deranged doctor seeks a way to restore their lover without divine magic.
At some point someone is poisoned.
As the adventure progresses a series of spectral laughs signal the arrival of a secretive champion

The characters are a group of monster hunters chasing a shapechanger.
It is at a walled graveyard which gives nightmares to any who try to sleep there.
There are a family of doppelgangers who have recently moved in. And a necromancer is planning a grisly ritual to animate the dead.
At some point a spirit tries to communicate with a character.
As the adventure progresses a series of grim omens signal the arrival of an eccentric king

The characters are travelers looking for a night's shelter, after their coach had an accident. One or more characters has an inquisitive pet.
It is at an ancient graveyard which has a garden of huge pumpkins.
There are kuo-toa worshipping many-eyed creatures. And a bone naga is trying to gain entry to a sacred place guarded by wards.
At some point someone discovers a trail of blood.
As the adventure progresses signs of an apocalypse manifest