We can upgrade it to Stone of Wind, Stone of the Earth, Stone of the Waters, Stone of Fire. Is this now possible? I also read that this item got nerfed in PTR because it was too strong. I cant find any plan for that. Maybe its not possible.
Can anyone explain me how this works maybe and how to get this plan?
The upgraded versions are versatility + int proc. They used to be mastery + proc on the PTR, which would have been incredibly good, but they were nerfed for live. Vers is a terrible stat for us so they aren't very good now. If you've been saving savaged bloods for making the upgrades, just sell them for gold.