This potent alchemy furnace has a total of 9 input and 9 output slots. When it runs out of material to smelt in the main stack, it will pull another stack into the input. When the output main stack is full, it will push it to an empty one or attempt to combine it with one of the other stacks. It has a 33% chance to DOUBLE the smelting result of each smelt, and it is also 40 times faster than a standard furnace. For 4 Dark Matter, this thing is a steal. It operates at roughly 2.5 times the material efficiency of a standard furnace, meaning a single piece of mobius fuel provides enough power to smelt the entire input list two times over. It's the best, and perhaps only way to efficiently use Mobius Fuel.
Note: If there is an alchemical chest near the Dark Matter Furnace, then when an output stack is filled it will automatically be pushed into the alchemical chest. If your output items mysteriously disappear, check your chest nearby for the missing resources.