Isengard operates under the rule of Saruman the White.
In his efforts to maintain control of his growing army and industry, he has assigned powerful Men to see to the working of each of the wards of the fortress.
If you can defeat the ward masters, you will significantly disrupt the efficiency of Isengard's industry of war.
'It would not do to be seen in here, ${PLAYER}. The servants of Saruman are everywhere!
'Saruman has made certain there are no shortcomings in his defences. He has placed each of the wards of the Ring of Isengard under a master to ensure that all matters follow his schedule and purpose.
'Orcs are not independently responsible, so that is understandable, but it also means that if you can dispatch the master of each of these wards, his finely-oiled engine of war should shudder to a halt until he can replace them.'
The Masters can be found at each of the spokes of the roads that dissect the Ring of Isengard.
Dagoras has instructed you to defeat the Master of each of the wards of Isengard.
Dagoras is hiding within the Ring of Isengard.
You should return to Dagoras with news of your success.