Overlord

The extent of the Overlords’ control over the Zerg is unknown, but it is clear that these flying behemoths provide direction for the other Zerg breeds. Although they resemble the Portuguese man-o-war of Earth, they are fairly docile creatures that tend to young larvae and transport other Zerg across the depths of space by carrying them within their shelled bodies.

With the ability to transport, detect cloaked/burrowed units, fly and provide "supply" units for the Zerg, the flying Overlord is one of the most useful and versatile Zerg units. The key to winning most battles will lie in the utilization of every ability the Overlord has to offer. Once those abilities are mastered, the Zerg can truly become a race to be feared.