The enemy forces have burrowed into deep fissures in the ground before the walls of Gundabad. They must be routed before the Gabil'akkâ can move forward.
'The trenches before Gundabad are crawling with all manner of enemy forces. Let us shake them from their burrows, shall we?
'Take one of the nearby powder kegs and burst them into the heavens. You shall have to make quick work of this task, however, as the fuses will not last forever.'
Enemy trenches can be found across the War of Three Peaks.
You should carry a powder keg to the enemy trenches.