If you are going for the hunter achievement i wish you the best of luck. This is the last mob i need for the zone and it will not spawn. I keep killing the hammerhead ph that spawns in the same room as the patriarch, the one with the moveable door. I have now seen the patriarch twice as i wait to see a ferocious hammerhead spawn even once. If you have lots of other targets and don't want to camp him i couldn't blame you. Better to wait for a patch and check at that point. EDIT: I was about to edit in that i had seen/killed 3 patriarchs, when i finally got the ferocious hammerhead. I was hoping for the treasure chest but it dropped Wand of Shadow, Shark Skin and i am sure was completely random a Words of Collection (Caza).
Edited, Jun 19th 2020 3:20pm by Rickymaru