Spooky DnD One-Shot Adventure - Spooky

The characters are working for the local ruler hunting a criminal. One or more characters is currently is carrying a disease.
It is at a walled graveyard which was the site of several murders.
There are hooded slaad cultists initiating new members. And a creature here is possessed by a sentient berserker axe.
At some point someone is murdered.
As the adventure progresses objects start to talk

The characters are gamblers gathering for a "special" competition. Two of the characters are former friends.
It is at a market on a large ship which has a sinister pentagram that only appears on this night each year.
There are acolytes of a local temple initiating new members. And a bone naga is trying to gain entry to a sacred place guarded by wards.
At some point a character has to make a roll to notice something.
As the adventure progresses more and more zombies start to approach

The characters are travelers looking for a night's shelter, after their coach had an accident. A character has a treasure map of the place, promising "a great reward".
It is at a noble's estate which was the site of several murders.
There are goblins who worship wolves, preparing a sacrifice. And a shadow dragon wants help entering from the Shadowfell.
At some point there is a loud knocking on a door.
As the adventure progresses the time of a bloody ritual approaches

The characters are a group of monster hunters chasing a shapechanger. A character is being hunted by a monster.
It is at an asylum for the insane which is haunted by minor spirits.
There are angry locals searching for a warlock. And a scout seeks to stop a portal opening at midnight.
At some point they receive a useful sending spell.
As the adventure progresses stars in the sky start to disappear

The characters are a circle of spellcasters hunting for a magical robe. One or more characters has an inquisitive pet.
It is at a derelict ship which is covered in mists.
There are hooded yuan-ti cultists initiating new members. And a bone naga is trying to gain entry to a sacred place guarded by wards.
At some point a door opens.
As the adventure progresses a series of screams signal the arrival of a titan