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How do you kill gold eyes demon? Or have I missed something?
You need Eyexo's Axe. You can get that from Credne the Smith if you do his quest.
Credne the smith is where? Hopefully not in ironstone mines!...lol
You get the sword not from Crednes quest but from Crosswitch Moor guys quest, but in the end Credne is the one who makes it