"A very big osmium mine that produces massive ore manually on click."
The Osmium Excavator is a Super Rare-tier mine. This is the second most powerful excavator in the game (the first being the Newtonium Excavator), with an ore value of $40,000. This works well with cell furnaces because of its high ore value.
The ore produced from the Osmium Excavator is large enough to become upgraded by a Morning Star without having to be shot through its hoop.
When launched by an Ore Collider, the ore from the Osmium Excavator will not fly, making loops with it convenient.