Fantasy One-Shot

The characters are imprisoned knights who must survive a magical plague. One or more characters has an inquisitive pet.
It is at a haunted magical laboratory which has a beautiful view.
There are a family of angry raiders searching for other adventurers. And an elemental cult seeks to win a race of dinosaurs.
At some point a chase starts.
As the adventure progresses a series of tolling bells signal the arrival of an elder being

The PCs are are lawful marauders who must destroy an assassin cult. The mood might be... deep
There is a desperate ranger who wants to do the same thing. they share a hobby with a character.
The characters start running away from something. Partway through they encounter a magic circle. If things slow down a rival turns up.
At the end there is a reward of membership of an elite group.

The PCs are shapechanging sages who must collect a bounty on a lucky band of mercenaries. A character is undead. It might involve ghosts.
There is an intimidating scout who betrays them partway through. they are the drinking companion of a character.
The characters start outside some ruins. At some point they encounter an animated statue. If things get stuck there is a fire.
Afterwards there is a reward of a grand feast.

The PCs are insane criminals who must break a curse at a magnificent mine. A character is accompanied by an annoying friend. It might involve elemental fire.
There is an angry guardian spirit who falls in love with a character.
The characters start in a tavern brawl. Early on they encounter a new potential ally. If things are going nowhere an animal messenger arrives.
At the end there is a carnival.

The PCs are mutant entertainers who must protect a dwarven spear. It might involve elemental earth.
There is a traveling thief who wants to do the same thing. they are the mentor of a character.
The characters start in a chase scene. At some point they encounter a trickster spirit. If things slow down someone tries to steal from them.
At the end there is a reward of a cursed but powerful magic item. Possible sequel... same villain in a new base