[jbw]

If an immortal pretender is attacked in a province with friendly dominion and its army is routed, it continues to fight to the death - which is good. However, the attacking army will also fight to the death, ignoring all morale.

Because of this feature my immortal pretender is able to kill an entire attacking army to the Last man when half of them would just run away if he attacked them instead. This makes attacking an immortal pretender much more dangerous than was probably intended.