Ghosts are feared terran covert operatives. They are known for their skill, psionic powers and ability to cloak. Ghosts take up two slots in a bunker. They have a Hold Fire command, enabling them to hide their presence even when hostile units approach. Ghosts make good counters against ravens, mutalisks, infestors, and high templar, but are weak against banshees, marauders, zerglings, stalkers, and zealots. They can also be used for mid game mineral line harassment and hydralisk hunting. Their EMP may be used to severely weaken protoss forces.