Board Thread:Suggestions forum/@comment-25793832-20160318215815/@comment-25793832-20160319173618

Without any effect it wouldnt have any special Dol Guldur touch on it.

Wither would take away your reason to craft Morgul Blades.

Poison seems to be the most interisting option, because as alteOgre said, there are numerous poisonous spiders that could be "milked", and later their venom would be passed on the edge of the blades.