The unkillable witch quest

[Zivage]

I am little lost on the quest right now.. I just poisoned the goblin chief and now I am in the witch dome. They took my hammer and I can't find the key for the witch door. Also how do I get across the gap where it says I need a rope?

[Supamand]

This quest has gone different for me. I've never had to poison goblin leader.
Anyways, you got to go and get a rope, I'm surprised you don't have one already this far into the game! (you can buy one in the starting town).
So get the rope, and get across the pit. There will be a maze of corridors with garden rooms. Kill everything and you'll get a witch key as you collect treasures.
Then go back to open door to the witches chambers. The problem though is that you need a hammer to kill her, that's the only thing that can damage her. How did you loose it anyways?