Cultist Razajan (sp?)

Anyone know where i can find this boss and more importantly his green. On xennon it says hes in unwaking waters but on the 5th attempt going there, i finally concluded that he does not spawn there, its Merki the Reaper.

Does anyone know where he is? Thanks

PS. Elite is Cultists Fervor.

xennon is correct on his location

reason being is because i farm his weapon for his HOD sword

basically he is right outside unwaking waters, but because u start at harvest temple, its like going all the way back where you came.

Does he spawn outside Luxon or Kurzick one? Also, does he "trigger-appear" or is he there all the time? thanks

I'm after his HOD sword too

He is also in Rhea's crater.