Dolls in the dark

So, like in Hobbit (book or filrm, I read a book when I was 13) but about dolls and dollish things. 

The only rule (to rule them all): There can be any number of riddles by user in  topic. But if answer is not right under the riddle, then riddle must be quoted.

here is mine to start

There is a prophecy,
of interstellar legacy.
It wont be too much thin,
more like a skin.
This issue is clue,
to get the glue
for that shell.
Hope you built it well.

what is it?