The Barrow Deeps was an ancient cave system beneath Mount Hyjal in Warcraft III. It was the sleeping place of the Druids of the Claw for thousands of years until the return of the Burning Legion and the Third War. After awakening the Druids of the Talon from their slumber, Malfurion Stormrage and Tyrande Whisperwind entered the Barrow Deeps in search of the remaining Druids. Meanwhile, Tyrande had freed Illidan from his prison. When reunited with his brother, Malfurion refused to trust Illidan after his betrayal long ago but accepted the aid offered.