Every 50 seconds, he will banish somebody other than his most hated target to the western prison cell. The prison doors can be lock-picked or you can shrink between the bars.
NO clue how the hell agro is supposed to work on this dumba** mob but he constantly agros for no reason whatsoever from two rooms away, then starts chain agroing everything nearby training your group.
As the description says, Jailor Muxfan will banish/port characters to the unoccupied jail cell nearby. The easiest way to deal with this is to set up in the banish cell and pull to there. Once you are max shrunk, you can run between the bars easily. You get stuck momentarily now and then but it's not terrible. Also, the banish cell is the only safe spot in the area.