Mungus

Mungus is a highly intelligent network of fungi originating from Mars known primarily for its ability to suppress Gound. It's considered to be omnipotent and is one of the three gods of Bean Co,. The Mungus Shrines and the Mungal Wars upon them are eternally fought to appease it in order to prevent Gound from consuming all.

Discovery
The disastrous Bean Co. Gound Expedition, which sought to find infinite gold for Bean Co.'s treasury, ended with the unleashing of the gound, immediately annihilating an entire reality and rapidly expanding into others. Bean Co.'s top scientists attempted to find ways to close the rift and suppress gound, to no avail. As the gound expanded into further out into the multiverse, scientists noticed it had routed around Dimension BR-002. In this dimension, an initiative had been launched to construct Bean Mines on the planet Mars. An unknown substance had been located within the crust of the planet which, when put in proximity to humans, caused violent tendencies. The pain the victims of this substance inflicted was found to be the cause of the gound suppression.

Contact
The first battle of Mungus lasted over a week, and in the end, one miner emerged victorious. A recon mission discovered him "standing on the surface of Mars in a blood-soaked spacesuit, his visor white with [mungus], having spread throughout all of the suit". An autopsy on the miner, who was dead inside the suit, revealed subliminal messages through psychic visions from the doctors doing it. Mungus had given an ultimatum: in exchange for a constant flow of fresh bodies for the fight, it would continue to ward off gound and protect the multiverse. The Bean Co. Religion Department was ready and willing to comply, constructing the Mungus City and beginning the eternal Mungal Wars.

Effects
Mungus has been known to cause violence, hallucinations, mild headaches, and immediate death from brief contact. Due to the violent nature of Mungus, and it's extreme side effects, long-term effects are unknown