The demons have activated their plan to turn the orcs and have infested a well with the Mannaroth's demonic blood. To reach the well, Grom have to destroy a portion of the forest to the north of his base with catapults. In the help of defensing the base comes the Troll Witch Doctors. They are the Horde healers, but they do not heal directly. Rather than that, they have a healing totem, which is placed near the wounded units or in the fight. In a regular game, the Witch Doctor need two special upgrades to be able to place the Healing Totem.