After the last purple/yellow event I still needed 2 arcanes for Infernal King’s third trait. Queued up the @Tacet build to farm for them (only 2! That should be doable!) and got one stone on like my third try. Woooo, one more to go!
I’m a wimp, I guess, because I gave up after a week. That War & Peace/Soothsayer x 3 build is easy and effective but soooooooo boooooorrrrriiinnnngg.
I made peace with my non-resurrecting Infernal King, stopped farming the challenge & then got the stone I wanted from a treasure map a day later. shrug