Hillarzu the First

is a crown-level fungus that can be encountered among other in the area.
 is a very rare spawn. Seems that to spawn him you need to kill some :
* => 99.75% / 0.25% 
* => 50% / 50% 
* => 80% / 20% 
* When slain, will always respawn as a .
(From: http://rom.onlinewelten.com/articles,id397,0,wechselbaelger.html#HeulendeBerge)