Unicorn horn help
So...I let the players shove the unicorn horn up the ass of a corpse. I shouldn't have, but it was funny at the time. But now they're in Thither and about to realize the importance of it.
Do I make them go back and get it or just change the location of the horn?
Edit: Thank you everyone for the ideas! I decided that the cemetery will be corrupted, taking inspiration from Evil Dead. The plants will be alive, the spiders and animals will be mutated. And at the end of the cemetery, where the horn was buried, a revenant.
I like the suggestion of the horn not being there, but I think I'll corrupt it. It will have magic but it will twist anything the players try to do with it and make it come about in the worst way, like a monkey's paw.