[Sombre]

Huh? You can change the stats of weapons like the wraith sword no problem via current weapon mod commands.

It can certainly be given 16 base damage. The code would look like this:

#selectweapon 110
#dmg 16
#end

You can't give it better berserk or fire res or anything like that because those are item effects - I guess that's what rdonj was referring to. Essentially items (forged stuff) may grant weapons and armour (things that appear under the stats on the unit info screen) which have the same name as the item, but they are NOT THE SAME THING.