Fungus beasts are very old, terrible, monsters whose bodies consist of decay ridden fungi and rot bloated sacs of toxin. Fungus beasts are not usually very aggressive beasts, electing to stay underground for thousands of years at a time, not moving, not doing anything other than growing. Though, when a fungus beast finds itself seeking to claw it's way out from underground, they become unsettlingly aggressive, often seeking out life to shred and devour without a second thought. The reason for this is believed that when a fungus beast comes up from underground, and finds itself severed from the roots that kept it alive, it must find another source of nutrition, and it finds it in living things.