D&D One Shot

The characters are veteran crime lords who must find a sacrificial rod. One or more characters are dressed in costumes.
It is at a haunted city rooftops which is protected by a suit of animated armor.
There are a pack of secretive robbers investigating an item - quiver of arrows. And an unlucky guildmaster seeks to put on a fashion show.
At some point there is an earthquake.
As the adventure progresses there is a series of disappearances

The PCs are all undead who must make a trade with a crazed tower. It might involve spiders.
There is a mysterious hireling who hates one of the characters.
The characters start in a fight. At some point they encounter mold. If things get stuck there is a explosion.
Afterwards there is feasting in an inn.

The PCs are respected lords and ladies who must create a safe place for a crystal axe. One or more characters has an inquisitive mount. It might involve elves.
There is a wise dragon hatchling who works against them.
The characters start in a tense stand-off. Partway through they encounter a pit trap. If things get stuck a villain turns up.
Afterwards there is a reward of the contents of a mysterious box.

The PCs are lawful sages who must recover a haunted key. It might involve winter.
There is a desperate fighter who comes with them.
The characters start at the scene of a murder. Partway through there is a romantic complication. If things get stuck a character learns something with a successful skill check.
At the end there is a reward of a treasure map.

The characters are dramatic urchins who must complete a ritual in an ancient theater. A character is celebrating a birthday.
It is at a magical underwater city which is protected by an awakened shrub.
There are a gang of unfriendly pilgrims choosing a leader. And a famous poet is trying to finish a masterpiece by morning.
At some point a deity sends an omen.
As the adventure progresses a series of tolling bells signal the arrival of an elder being