throu out history if a worthy warrior transcended the ability of the common soldier sometimes it was attributed to the weapon thay welded and those weapons rose to glory and legends dispite more often then not it is but a normal weapon with out any special abilitys
now for the idea part
with the use of some hafen magic mabye we chould engrave a name and once a name is given you can mark it with a kill count (also with magic and only near the time of killing prob cheaper then the engraveing) it wont add any stats for say to weapons but whould produce at least a few legendary weapons in haven mabye even to use a sword you did not engrave you'd spend a small amount of exp on some magic to sync the weapon to that char and now your name will be showen when weapon is inspected (which is how youd see it was a sword of legends so mabye some legendary sword are being used but the owner if never inspect might not know thay have a peice of hafen history)
prob suggested before i like following weapons and items in movies and shows so thought chould be cool if had a way here to make mythological weapons