Bring Jin'rokh the Breaker a Primal Hakkari Tabard. You must also have a reputation equal to or greater than Revered with the Zandalar Tribe.
Jin'rokh the Breaker is located on Yojamba Isle, Stranglethorn Vale.
Battle gear gives you power in the tribe. The freethinkers are honored in this way. They are zealots. They imbue their breastplates with powerful mojo. If their beliefs falter in the face of the enemy, their breastplate will not.
You must be revered amongst us to possess such a breastplate. Go to Zul'Gurub. Take the Paragons of Power I need. Take the Paragons most painfully from the fools inside. Bring them to me. Prove your worth as a freethinker once and for all.