In short, I made an animated whetstone, by activating which, you can improve the attack of vanilla weapons. It is located in the Arena next to the training area.

If you make a mistake with the weapon (or before deleting the mod), you can take it back in the location:

coc TestMattCenter - [Base Items] chest
(From there you can freely move back to the world.)

Credits - The creator of the apron and the creator of the whetstone, i.e. original developers.