The Forgotten Hold

From the description:

An evil wizard has built a lair deep in the mountains in an old Dwarven outpost. He spends his days creating living weapons which he uses to terrify the local populace. His raids, once common and feared, have all but stopped and there have been sightings of a large winged creature flying about the peaks to the north where is laboratory is said to be. The local populace have cobbled together a reward for whoever can bring proof of the wizard’s demise and put an end to whatever creatures he’s built.