Zandalar Signet of Serenity

Zandalar Signet of Serenity was the healer version of the Zul'Gurub shoulder enchantment.

Source
The Zandalar Signet of Serenity is a quest reward from the quest which begins and ends with Rin'wosho the Trader on Yojamba Isle in Stranglethorn Vale. To complete the quest, you must turn the following items to Rin'wosho:
 * 15x

You must also be with the Zandalar Tribe.