He Apparently drops something worthwhile this time round. Might be worth the frustration.
Ring of Blades +1 (i think)
Hmmm...Ok. Off the top of my head.
When you enter Iron keep, go across the bridge( 2 enemies), through the door (2 enemies) go up the stairs ( 3 enemies) and out the other door. In the middle you should see a big furnace you need to deactivate. Do this by turning the wheel on the door and then pulling the lever on the right( I did right.. left may work too). Go inside, up the ladder, kill the lightening sword guy, up the ladder. Kill those 2 turtle things on the bridge. At the end of the bridge ( watch the gap) through the door, there is a door on your left. That is where the lockstone is, hit the highlighted wall and go up the ladder....Welcome to Belfry Sol.
Ok cool, I know where you mean. I've cleared out the start of the Iron Keep and have furnace deactivated already. I want to go to the Belfry Sol to farm a phantom that drops the Mad Warrior armor set.