The Red Mage, also known as Red, is the first Boss you will encounter in the Campaign.
The Red Mage can be found and killed on the Campaign level The Mage Base
Before The Red Mage was defeated he sent a message out to The Green Mage , warning of the Dwarves return.
The Red Mage was well known throughout Greenskin ranks, and this is shown when the Orc Shaman is defeated and is disappointed that he could not revenge Red's death