That doesn't stop Snorri from deciding to send a team to investigate the northernmost of the Zorn Uzkul lakes so you'll know for the return trip whether it can be relied upon as a source of water. It comes as a surprise to you that wholesome water supplies can exist in the middle of Chaos Dwarf territory, but you suppose that even Dwarves would think twice before taking on an aquifer. Either that, or Zharr-Naggrund is reliant on this water downstream.
You travel with them to the lake, more for the company than out of safety concerns, though it's likely that if you asked there'd be a significant disagreement over who's protecting who. Once you arrive, the eldest of the Rangers takes a very cautious sip, swishes it around in his mouth cautiously, then nods and swallows. The Rangers all fill up the waterskins they've brought with them for this purpose, apparently intending to create a type of ale that the Rangers of Karak Vlag would only make from the waters of these lakes. What you know of brewing says that if the Expedition suffers no further delays, it will be about ready to drink by the time you're almost back at High Pass, and you wonder if the plan is to drink it or to leave it for Karak Vlag in the hopes that they'd take it as further evidence they're back in reality. Perhaps both.
You part ways with them as they head back to the Expedition and follow the trickle of an outflow as it carves a deep furrow through the empty landscape, galloping along its winding length for a couple of hours until it and you reach the river flowing from the largest of the four, and then three more hours following that until it reaches the second largest of the lakes, which is large enough that you can't see the opposite shore and it takes you two hours to circle around it until you reach the outflow. From there it's another hour until you reach the unnamed falls that disappear into a ravine carved in the southern edge of the Zorn Uzkul plateau, plummeting downwards in a great waterfall taller than most mountains. Somewhere on the western side of that ravine is Clan Moulder's Sixth-Combe, and somewhere on the eastern is the Seventh-and-Final-Combe. This is Clan Moulder's front line against the Chaos Dwarves, from where they raid and are in turn raided by Zharr-Naggrund to the southeast, which is visible as a great column of smoke on the horizon.