An excellent in-game analysis of adventurers from the point of view of the ruling classes.
“What are these men? These men, sire, are those whom will think absolutely nothing of killing every single one of your guards if you send them onto their group. They will further never rest at that point from hunting you down and killing you because you have betrayed them. They value this perception of gratitude and their own infallibility more than they value your life or the lives of all of your men. Worse, your guards will prove to be meaningless to these assassins. They wield powers that can shake the very foundations of the castle and bring down the walls with such ease as you might consider them an earthquake. Their warriors can slice up dozens of armed men and take hundreds of arrow bolts without dying. They survive fireballs and bolts of lightning from the Heaven and seem to grow stronger as they kill.”