Вот отрывок из транскрипта:
[Bilbo:] “But the years of peace and plenty were not to last. Slowly, the days turned sour, and the watchful nights closed in. Thror’s love of gold had grown too fierce. A sickness had begun to grow within him; it was a sickness of the mind. And where sickness thrives, bad things will follow.”
[A shadow begins to cover the massive gates of Erebor. Thror walks through his massive rooms full of treasure, looking consumed with greed. Thorin watches him from a distance, then slowly retreats into a shadow.]
Про тень в фильме не говорили, её просто показали.