Sheaths/Scabbards Would be a nice addition, even if the only advantage is roleplay, or a quick draw function (press a key out comes the sword, otherwise mess about with the inv).
Adding magic to a sheaths is an interesting concept.
I imagine perhaps a gylph on a sheath (inspired by runic magic?) to give a blade an ability on its first strike once a game day? such abilities could be anything inline with the current magic system (maybe even draining character mana? for use)
As for sharpening sheaths I haven\'t heard of this outside of modern kitchen knives. I\'m not against the idea just unware of its use. I\'m only aware the use of a wet stone or grinding stone.
I guess its prudent to point out that sheaths / scabbards were mostly made of wood or leather.
The obvious reason is cost, but other reasons are apparent during times of war, where metal was needed for swords and armour.