Ok I actually quite like this one, is not so much of a prompt as something you could use to foreshadow

Need to add a new creepiness to your story? Use the crow counting rhyme

One is for sorrow
Two is for mirth
There is for wedding
And four is for birth
Five for silver
Six for gold
And seven for a secret never to be told

Just add the appropriate amount of crows in the background when you want to foreshadow something

(Btw sorry for all the updates, my phone hates me rn and is auto correcting stuff like crows to collaborations smh)