Talgath was an old friend of Velen, entrusted by the prophet to gather eredar who were wary of Sargeras and his tantalizing offer. Unfortunately, Talgath was seduced by those very promises, and betrayed Velen and his cohorts to Kil'jaeden. In spite of this, the naaru managed to spirit Velen's faction, the Draenei, away, bringing the Deceiver's wrath upon him. (RotH 12, 14-18)