So, I was bored and was thinking about the stats of trinket combinations. So I did this~
According to, http://ao.igg.com/news/news.php?aid=4784, Demon's Locket trinket might have:
Has a chance to increase all damage reflected by 5% when using skills to attack. Lasts 10 seconds.
I cannot confirm it because I have not used my Demon's Locket nor do I intend to.