The Matrium!
It is a type of spreading fungus that can only spread in the dark. This way, it would only exist in ships (In places were lighting isn't high) and in caves. Direct sunlight would damage it. However, if it is a player made light, its spread would decrease extremely, but...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.