The Kingdom of the orcs is a strong one they had won countless battles and conqured many including the Reptilians that they had inslaved eons ago

You gain obtain Orcs by purchasing any Hero packs that come with "Commons" or by winning them throughout the Campaign.

You can obtain them in these Campaign missions; "The Root of the Corruption " (Heroes Act 1 last mission) and "Of Orcs and Men " (Heroes Act 2 second mission)

Orc profile