Here is a situation we had almost come up, and wondered what to do if it does.
I have the archbishop councilor. At the beginning of a round, I decide to play 2 crusade cards back to back. Before my second card my archbishop is murdered/bribed/I somehow lose him. Can I still make that second crusade since I already played it? Do I just forfeit that action and move on to the event?
You don't have to do the action of the action you play and in your case, you have to just play the second crusade card and not do the action, just the event. Not all bad though since crusade cards usually have good events.