Smelting things is very normal in minecraft.
you do it all the time right!
Since we do not wanna break vanilla gameplay but do wanna improve the way things go we introduce a High end furnace.
its your normal furnace with some improvements depending on how much you melted in it or how much money you put into it !
How do u use it?
Place down a normal furnace.
hit it and you will see the gui open with its current statistics
the higher the level the:
faster it melts
Less fuel it uses
More output it gives
Everyone can use this.
higher ranks can also upgrade using XP