The Shadow Talker is a headpiece that allows the wearer to understand the language of the Shadow Clan. It was previously used and then locked in a chest by Will Shane. It can only be used by people with strong minds, but they can still take serious mental damage if they use it for too long. Eli Shane is the first person to be able to withstand the effects of the Shadow Talker.
It has the same black and green colouring as the Shadow Clan and looks like a tiara that is worn backwards, with one small spike coming up from it. The leader of the Shadow Clan described it as a "circlet" -- a specific type of crown.