Really odd question.
I am looking for the name of a fanfiction that may have been deleted.
It was a really sweet afterlife one shot.
Basically, the dwarves are of the Earth and stay on the earth after death, so Kili/Fili/Thorin are on the lonely mountain. Kili sees the procession of woodland elves headed home with Tauriel's dead body at the front.
Tauriel chooses to remain on earth in the afterlife, with the dwarves and shows up from a portal.
Because it is not her afterlife, she just kinda exists, whereas Kili can manipulate the world. He can fly and it ends with them dancing in starlight.
The fic has been stuck in my head for quite some time and I lost all my bookmarks. I want to say that the phrase "as you wish" was used in there, but I honestly can't remember
I don't know the fic you're talking about, but maybe one of our followers does?