It's possible you're thinking of a different item, or perhaps you're remembering something from a different game.
Could you please clarify your question?
For example, do you mean:
* A specific type of item used in crafting? If so, please provide more details.
* An item that is used for a specific quest? If so, which quest is it?
* A material used to upgrade weapons or armor?
Knowing more about what you're looking for will help me give you a more accurate answer!