Epic Unit

An epic unit is defined as an incredibly powerful unit, often taking a long time to produce but can engage and defeat entire armies of ordinary units. They usually make use of experimental and/or classified technology, hence their considerable price and the need for a high technology access structure to be produced, along with the fact that only one of each epic unit can be present at a given time.

The Allies are the only faction who lacks any epic unit, although the Paradox Engine that only appears in their campaign can be considered, in a way, as one.