I apologize for not answering sooner.
This is an item that is used to enter Rala Waterways (U) when combined with a Faithful's Torso and Faithful's Legs. Assembled by Oston in Eastern Adoulin. Affects quality of individual treasure and drops found within the Skirmish.
Here is a link to the main page for the item. There are links on the page itself that you can follow to find out what it is you need to gather the other item for Oston to assemble, if that is what you are after. Skyfiredancer (talk) 22:01, May 13, 2017 (UTC)