The Hist

This is one of the most fun fighters guild missions because almost everyone drops an enchanted item. Head down to Leyawiin, go to the Blackwood Company building and pull anyone who attacks you back into the streets, where the guards will converge and help you kill them. Keep doing this until the place is cleared and you have access to all the rooms. Sometimes the main guy with the key wont leave his room, just enter the other room you unlock and he should come out. When you finally get the room with the hist tree in it open, pull the guys out in to the street, and upon your arrival you should notice two loose pipes on the floor after collecting these into your inventory just click on the gears on both sides of the tree.