Lachrymae Christi

Lachrymae Christi is a leper colony. The world that is entirely covered by blood-red plants that evolved naturally over millions of years. It has always rained there, and complex underground caverns hold the water before it is evaporated into the atmosphere to fall again. The plants are mobile and part of a large consciousness dubbed "The Red Brain," which Moon taps into during Owen and Hazel's last stand to defend the colony from an army of Grendels.