I killed many 80lv BS bosses but never got that.
It's hard to get this boss on Urzark, because some ppl farm there 24/7 and come there with full buff/deleveled chars so I can't compete with my jump toon, but sometimes I get chance, and kill this bosses.
This stone drop only from specified boss (like this hard one with all stat and dot debuffs) or any kind of this bosses?
Also, if someone got it from 70lv boss too, let me know.