|Ivar the Blood-hand|
"Garth Agarwen . . . The ruins of an ancient fortress of Rhudaur, now overrun by corrupted nature and a vile necromantic power out of Angmar. The most terrible power still remains to be confronted."
Ivar the Blood-hand is a Gaunt-lord, a being of great and dark power, made in mockery of the Wizard Radagast the Brown. He is weakened at the moment, not only by his meddling with Radagast, but also as he continues to raise the army of Dead within the bounds of Garth Agarwen.
This is the role, and stopping him from achieving this role no matter how minutely, will see that the mark of his hand is removed from the land. To do this, you must ensure that his banners remain so that at his death his power is split between them.