so today i let him rampage the zone for a while, he attacks almost everything. I thought i'd see if he attacks pyzjn so i pulled him back to the undead ruins. When I FD'd him on top of her (he doesn't attack her btw), he shouted this :
[Sat Sep 16 19:57:52 2023] Varsoon the Undying shouts, 'Your fate is sealed, foolish mortals! Cower before the might of Varsoon the Undying!'
Then he turned indifferent and summoned a pet and started walking around (still agroing mobs). Speculation is maybe he accepts a quest item of some sort, GBS maybe? after turning indifferent