Whoa, that's an old quote. Yeah, you can get the next sword; try looking around for a magic mirror glyph in the eastern part of the dark world. You'll still need the level 4 dungeon item.
Also, try hitting enemies with things other than the sword. Some things are stronger against it than others.
For those who thought this quest needed a disclaimer that it's difficult, I made it more clear in the quest description today. I didn't change the quest, just the info on PureZC.





