So much is happening here!
The dream vision is riveting.
Interesting that after so many references to this sister, we get her name halfway through.
Right before she apparently fulfills the dream.
I never found anything other than her necklace.
Well, that gives me hope that she somehow survived - but if so, his vision was inaccurate.
Or incomplete...?
Exit sister, Enter, dragon...

Just one suggestion: keep verb tense consistent. Is the narrator using present tense, or past?