Human meat for zombie in cemetary

[Ryastar]

You have to have talked to the dwarf after blowing up the thing outside his hut, but before going to report to the witch that you have done it. He will then give you a quest to go get some things from the zombie in the cemetery. After you retrieve the things from him, you get the option to fight him. He will not talk to you unless you have the dwarf`s permission, so if you missed the quest (like i did on my first playthrough), tough luck, but you won`t be able to fight him.