Disease
From SporeWiki, the knowledge base dedicated to Spore
Disease is any abnormality in the body or mind of a creature that causes discomfort, distress or dysfunction. It is unclear if your creatures will succomb to one or more kinds of diseases and when in game they will show up. While it would seem to make the most sense for diseases to pop up during the Tribal Phase and appear from then on, it may come during the Creature Phase as a challenge of some sort.
