Uruk warriors like Mozgog were by definition those treacherous and brutal enough to claw their way into a position of power. Having killed many jealous Orcs to reach his standing in the armies of Mordor, Mozgog had no friends and many mortal enemies, making him as dangerous as a cornered animal. Forays into Gondor to harry the enemies of Sauron had earned him the loathing of the proud soldiers of the South, but many had fallen seeking revenge. Mozgog could stay in the fight long after others would had bled out, and every swing of Mozgog’s terrible sword might have been be the end of an enemy.
- Guardians of Middle-Earth