Quagmirran is the leader of the fungal giants along with Hungarfen who side with the Naga and a villain in the Warcraft universe. He resides in the fungal cave system while he leads his forces.
It is unknown how Quagmirran sided with the Naga but he managed to get several fungal giants to join his cause. As the adventurers of Azeroth stormed into the Slave, they confronted the bog lord. In the end of the conflict, Quagmirran was killed by the adventurers.