while mechanically it would still be a club, i'd think that the local authorities might have an issue with it, plus it requires a bit extra suspension of disbelief that the blade wouldn't snap the first time it hit something hard if it is just regular wood. Those were my two thoughts on why just saying my club is scimitar shaped wouldn't work out. While its creation may require magical abilities that are out of the scope of this game, that doesn't mean the item's abilities would be beyond it too. It is a possible future treasure item or plot hook. If you want to just let it fly as an oddly shaped club for the game, then i'll just run with that rather than make it complicated.