To be more specific, I think its either the forrest funguar or its the stumbling funguar. If you're high enough try the faerie funguar. I've gotten several though and I'm not strong enough to take on the faerie funguars yet.
I saw some 'Shriekers' near the celestial gates spread out near Gridania in the areas with the higher level mobs that one shot me for 4k+ points at physical level 7. Maybe they drop them as well. They were red to me so I just snuck past them without introducing myself.