Aratrok is an Orc shaman and chieftain of the Redskull clan who dwell on the island where the Skull of Shadows is hidden in Dark Messiah of Might and Magic. He is a devoted and fair leader to his own people, and fanatical enemy to any people he considers to be a threat.
Hatred for demons and wizards flows in his veins like any orc's, aware of his kind's origins and past sufferings.
He resents the intrusion of Menelag's expedition and will order his people to fight against them to the death.
After Sareth uses the Shantiri Crystal to power the Shantiri Spider Temple, a group of orcs ambushes him and Aratrok introduces himself to Sareth who he challenges to a fair fight of might without any magic, and swears onto his honor that should Sareth prove mightier than himself then he will be free to walk away and the other orcs of the clan will not attack him if he doesn't.
Sareth can then either accept this challenge and battle Aratrok only with might while the other orcs watch the duel and let him walk away after or not care and use everything he can, triggering the other orcs to join the battle since he has no honor.