For my mod I am trying to make it so that in my custom furnace you put a mixer (custom Item I made) on the bottom and on the top a stone sword. Then you will get a more advanced version of the sword depending on what mixer you use.
The Mixers are called, Ninite Mixer, Diamond Mixer, Gold Mixer, Iron Mixer, and Coal Mixer. Basically you always have the stone sword on the top, the powerful the mixer on the bottom (list goes from most powerful to least) the stronger sword you will get as a result. This may be complicated to some people and this is why I am asking for your help!
Like I said it is for MY OWN CUSTOM FURNACE not the regular furnace. So if anybody could help that would be awesome!!! Thanks!!