A Trollhunter legend

There is a Legend in Hearthstone Trollmarket. Inside of the Hearthstone lives an elf. Who use to be among humans and trolls alike, but when trolls lived underground instead of caves, the elf decided to become one with the Hearthstone to protect them.

What happens if this elf detaches itself from the stone because of Jim the Trollhunter?

Find out in my book, about the new Netflix Original series, Trollhunter. I do not own the series or characters, only my ideas.

This is set after Claire sneaks into Jim's house to see what he's hiding. (Episode where Mr. Strickler has dinner with the Lakes and shows his true form to Jim.)