Like since all the yakshas are dead Xiao might plan on asking someone to end him when the time comes and the person I think would fit most would be Zhongli or the traveler. Or he'll try to isolate himself before it took over him and goes wham boom on everything but even then it might not be effective .
Ok I made myself sad fuc-
Copium that after the recent 2.7 quest he discussed a better plan to solve the karmic debt issue with the others since he might appreciate himself better now.
I don't believe that karmic debt could be totally purified but maybe Venti or the traveler could ease his burden massively in some ways. Still it's sad how he's still likely to die a painful death or an amnesiac like Boss :((
