why are all the priests of Mara dead?

party goes to investigate the actions of the previous adventure group. encounter and bother the new evil god on plane. investigate his origins my some questions and by distracting him and investigating the area he is in and eventually reach a conclusion of what happened. they then attempt to find a temporal anomaly to travel back in time and stop the creation of the evil god. they fail to find the evil god but find other fun things within the multiverse.