To be rid of Jersey Trolls you must aquire a Mystical Troll Flute, which is used to expell the Jersey Troll from her cave.
The Jersey Troll is also commonly known for her phrase "riddle me this" of mystical spell casting. Beware.
Elfin M: That's fucking disgusting, I saw her do it to, and when I was walking out the door she blocked me and asked me to solve her riddle!!
Elfin L: Did you use the Troll Flute?!
Elfin M: Hell yes I did!