Zandalar Signet of Might

The Zandalar Signet of Might is the melee version of the Zul'Gurub shoulder enchantment.

Source
The Zandalar Signet of Might is a reward from the Horde and Alliance quest Signets of the Zandalar which starts with Rin'wosho the Trader on Yojamba Isle in Stranglethorn Vale. To complete the quest, you must turn the following items to Rin'wosho:
 * 15 Zandalar Honor Token

You must also be Exalted with the Zandalar Tribe.