Sterility fosters in Acheron, going against all rationale, except for the Crimson Mushroom. While everything else falls apart and rusts away, it spreads its spores in the air when two cubes collide. It grows over corpses, absorbing the flesh-metal mass into its soaked red body with little metallic stripes. This mushroom can be dangerous to walking sentient life, too, entering the lungs and suffocating the victim.
