Brogreepursis (BS) is a disease that only affects the head, neck, and feet, and can only be spread between siblings. It causes symptoms like a boiling head, freezing feet, an itchy neck with green rashes, and purple or green spots on the face. The key ingredients for recovering from BS are Aquae leaves and Greepur fruit, which are used to create treatments like Aquae leaf spray, Greepur fruit drops, Aquae leaf drops, and Greepur fruit cream.