Epistolary Richards and Ciaran thanks for your replies. It is a shame that the event is hardcoded. My ambition was to make faction last longer since I find that some die out too fast. Well there are other ways. Just removed assasins from the game and I will add some traits to family members (fertile and so on) + increase the number of family members a faction get when hording. Will make some other changes to trait triggers to increase the chance of getting the trait "fertile".