So, having survived dealing with Durgeddin the party (now down to a mere 5 members because of random dissapearances, what a freaky city) negoiates with some duergar and their succubus leader to gain their assistance in the final battle. The succubus houses them in the local duergar temple which is very, very haunted but only on the front half. Amazingly enough nothing bad happens to the party that night although they do realize that the Inevitable may have gotten the wrong duergar. Mist also attempts to destroy the crystal that has been messing with his mind using a hammer acquired from Durgeddin. He crushes the crystal but the shards inhabit the hammer which he hastily returns to the bag of holding.
In the morning the party meets the duergar but Mist realizes its an ambush. Nerolia and Mist put some smack down killing most of the duergar and then Veras finishes of the succubus. The remaining duergar (singular) beats a hasty retreat somewhere else.
Mist and Veras head off and explore somewhat indepently while the other party members acquire some weird black water. Eventually the entire group arrives at the main forging area. Running through the middle is a stream that drops into a hole. Using their awesome powers of deduction the party concludes that the importance stuff is probably down the hole and journeys down it.
Down the whole is a huge chamber that is flooded with several small islands, including one with a forge, and a very large black scaled thing commonly referred to as a dragon. Even though dragons don't exist of course. Regardless of its existential issues this dragon seems to be part of some sort of device that is draining random fluids out of it as well as keeping it restrained. It barely notices the party and when it does it only manages a minimal reaction even when it does notice.
The party notices a very deceased adventured in the corner and Veras investigates. The deceased adventured is quite well equipped. In the meantime Mist and Moros move onto the island with the forge, the water is easily wadeable, and investigate it. As they do the local defense forces, aka two pit fiends, rise up out of the water to attack the intruders. Veras goes down (WIMP!) but Mist manages to pull out Durgeddin's hammer and shatter the forge before the pit fiends get to him and Moros.
Giant explosion.
Moros is hurt pretty bad post explosion but being the die hard he is remains standing/floating. The pit fiends collapse into the water and the fire elementals bound with them offer a silent thanks to Mist. The black dragon begins to die but Veras briefly halts it thinking that someone else might be able to heal the great beast. However the dragon communicates briefly with Nerolia asking to die and apparently explaining the identity of the dead adventurer. Merle then sneaks up onto the dragon and kills it while the others are figuring out what to do about it. It proceeds to dissolve into a pool of acid.
The party then opts to return to the surface and meets with Irontusk, Shadow, and Illustan who inform them of a current "doomsday" situation. The party is off to their next adventure.