This has probably happened to others, but I was just so surprised and pleased that I had it happen to me that I wanted to post it here
In one of my SP games I am playing Ermor using the Throne of Heroes mod. I was about ready to lay siege to Agartha's capital when I was attacked by a large army led by the Kin-Breaker Onyx Oracle.
I was victorious in the battle in a way that was way beyond anything I could have guessed. Through multiple castings of Apostacy by my Grand Thaumaturg's I was able to get the Kin-Breaker to switch sides and join Ermor. He is now my Prophet!!!
I guess he decided he has more in common with the walking dead then he realized