Mark of Purity  

 

Took me a few days to get this one. I killed every Underbulk I saw til I got the Blessed to spawn. There are alot of named Underbulk's that spawn in the hidden valley as you kill off the regular Underbulks. Just have to be patient and wait for the one you are looking for to pop. They coned light blue to a lvl 53 and every now and then one would be dark blue. Also, the Rhino beetles will agro on you if you get too close and will help out an Underbulk if you are fighting it so watch your back. Hope this info helps anyone who goes for this quest.