[Morgeruat]

there are some nice ones in the game, and using the DM toolkit you can make any weapon do anything, like a holy bastard sword, keen(raises critical hit %), vorpal, you can have it do spell effects when it hits, the sky's the limit, however it does have to be under the lvl 20 required character level in order to ever be legally usable, otherwise you have to open a multi game and diasable item level restrictions, or change the NWN.ini to disable it