The Shroob Life cycle is easy enough to understand. * Shroob Spore/Mushroom: Spores are ejected from the caps of Support Shroobs (see below) during a special cycle in their life. These spores begin to grow in a mushroom-y way in the soil. They will grow into a Shroob Mushroom. The mushroom will develop eyes and a mouth. At this point, if it is fed with certain chemicals, it will change its caste from worker to something else. It will then grow arms and legs to uproot itself. This stage lasts one month. This stage lasts twenty months. This stage lasts twenty-one years.