During Malfurion and Illidan's joint attempt to save Tyrande Whisperwind and the Sentinels accompanying her, Illidan and his naga slew the Shadowglen Trolls in their way in order to make a faster route to the Undead Scourge base — which was besieging Tyrande's group. Krag'jin and other forest trolls died defending their dams.[1]
The exact fate of the Shadowglen Trolls is not known, though since they do not appear in World of Warcraft, it is possible that they were wiped out by Illidan's Naga.