Droth was a milky white substance produced by the Terran/Lagunans on Laguna 7. It was shipped to Laguna 9 in vast refridgerated tankers, where it was pumped into the air supply to prevent the outbreak of Laguna fungus. It was the Terran blockade of Laguna 7, stopping the droth supply, which resulted in their victory in the Laguna Wars, the Terran/Lagunans dying from fungal pandemics.