Someone once told me that if you can truly see the good in a person, then you can also see the true darkness in that person. Those are just a few of the words that I live by. But sometimes, there isn't any light to be seen in a person. When you can't see the light in a person, it just means that the darkness has overpowered the good in them. When Trixie Lulamoon discovers the instrument of her revenge, the Alicorn Amulet, the darkness in her truly overtakes the light, even if there was almost none to begin with. With one of the most powerful of all of Equestria's magical trinkets in her possession, how will those who have laughed in her face fare? My guess... is not very well.
Trinkets is a psychological look into the character Trixie shortly before the episode Magic Duel takes place. I think how attached she becomes to the amulet really shows just how easy it is to becomes lost in the darkness.