Wargs don't appear in the movies. Goblins rode them in the Battle of Five Armies, during The Hobbit.
Nice section, I have only a few comments, which are off the top of my head (I still intend to get an in-depth review to you sometime).
"Seeable" should be "visible."
>The elf then shot it in the head and the spider died.
That's... very anti-climactic. Just use much stronger adjectives and change the format a bit. The spider fight scene was better than most, good work.