Sundered Rock

First step in defeating a foe is to make 'em flinch. Hit 'em hard and they'll think twice about hitting back. Now that the Skaven are scurrying about over there, it's time for us to push in and recover the explosives cache. You heard me right, |n. We're going to collapse the tunnels the Skaven are pouring out from. First we need the proper tools. That's why I had you stir 'em. It'll give us a chance to move in and recover the goods. Here take this flare. Find the cache and send us the signal. We'll be there.

Return to the supply depot infested by Skaven near the Warpwind Warren. Use Rorrik's Flare by the black powder supplies so that Firehelm's Engineers can collect the goods. Then return to Lieberholz's camp. Speak to one of the Engineers there.