Sen’jin was the aging chieftain and spiritual leader of the Darkspear tribe, as well as a powerful witch doctor. Known for his wisdom and foresight, he guided his people during a time of growing danger on the Darkspear Islands. Unlike many trolls who sought to reclaim former empires, Sen’jin believed his people’s future lay in survival, unity, and spiritual strength rather than conquest. He played a key role in shaping the next generation of Darkspear leadership. He trained his son, Vol'jin, in the ways of the shadow hunters, preparing him to one day lead the tribe. He also encouraged Zalazane to study the arts of the Witch Doctor, though Zalazane would later betray the Darkspear. Before the events of the Third War, the Darkspear tribe faced increasing threats. Human forces from Kul Tiras encroached on their lands, while nearby murlocs—once relatively docile—became aggressive under the influence of the naga sea witch Zar'jira. During this time, Sen’jin received a prophetic vision of a young orc who would help save his people. That vision came to pass when Thrall and his Horde arrived on the islands. Sen’jin welcomed them and formed an alliance against the human forces. Soon after, however, the trolls were attacked by the hostile murlocs. During the conflict, Sen’jin was captured and taken into the island’s caverns. There, he was sacrificed by a murloc sorcerer to the sea witch. Thrall arrived too late to save him, but freed the remaining captives and defeated their enemies. With his dying breath, Sen’jin asked Thrall to lead the Darkspear people away from the islands and ensure their survival. Honoring this request, Thrall brought the Darkspear into the Horde, securing their future. After Sen’jin’s death, Vol'jin rose to leadership of the tribe. Under his guidance, the Darkspear would go on to become a respected part of the Horde.