I decided to try the Fungal Arts path, the first skill, called Mushrooms Farmer is described as
Mushroom Farmer: You collect molds, spores, and fungus. You like to grow mushrooms on the bodies of your enemies. Sometimes this comes in handy; usually it's just weird.
When I use that skill it creates spores: I tried eat them but I can't, I tried put on dead bodies, nothing happens. How to use them?