Questionable Motives

You have shown that the Fly Lord's forces are vulnerable, and that their hold over the northern portal is as strong as their constitution. As their flesh rots away from their bones, so too will their grasp over the northern portal weaken over time. However, we do not have enough time to wait for decay to take the wretches. Perhaps we can accelerate the process... We shall turn Troll Country against the Fly Lord and see that he finds no welcome here. But first we need a pound of flesh... a pound or two.

Ascend the Desolate Plain to the Nurgle cultists' place of worship and kill the Bloated Priests for their plagued flesh. Return to Helmut Lustig in Trollhaugen once you have acquired your pound or two of flesh.