Aergrim gets approval from the city to activate the old trade portal which leads scouts to their destination, reminding once more keep disks safe as it's the only a reliable way for them return. The portal swirls and forms a dark oily horizontal pool inside portal frames, once stepped through, brief chill and sense of falling, you step through portal into ancient old duergar outpost. Formerly trade outpost, which appears long since scavenged and abandoned and portal snappy closes behind you.