Bring Jin'rokh the Breaker a Primal Hakkari Armsplint. You must also have a reputation equal to or greater than Friendly with the Zandalar Tribe.
Jin'rokh the Breaker is located on Yojamba Isle, Stranglethorn Vale.
Vengeance is power. The Zandalar vindicator is such power. The tribe has many enemies. The vindicator exacts retribution on them. No crime against us is unpunished. The vindicator delivers this punishment. Our enemies fear our vengeance. They should. They forever will.
Become one of our vindicators. Seek the Paragons of Power inside Zul'Gurub. Slay the minions of Hakkar and claim vengeance in the tribe's name. You will be rewarded.