The group returned to Seven Pillared Hall and told the Ordinator Arcanis about the Duergar who were in the Chamber of Eyes. The ordinator was interested and offered the group magical items if they uncovered the duergar’s interest in slave trade.
The group then spoke to the Duergars present at the outpost and they got really pissed and destroyed all the Duergars who were present there. After that they found a map that lead the group to a place called the Horned Hold which is apparently the headquarters for the Duergars. They adventured into the hold and killed 2 groups of orcs/duergars and then killed the weapon smith. They were starting to cross the bridge into the next section of the Horned Hold but then everyone got too drunk and went to sleep.