[Endoperez]

Enemy-spesific heroes, and better definition for 'in war' than the current.

Some heroes that only join you when you confront spesific enemy, possibly restricted to some nations. Whether or not you are in war with someone would be found out by examining the number of battles (possibly over several turns, although that is not needed) and the number of units that died in those battles. In some cases, just the fact that certain nation exists would be enough.

As an example, if Marignon is fighting against Ermor, they should be able to get more and different heroes than usually. Renegade Star Child with enough mental power to block his mind from reading (S2 or even S3) might want to join forces with the enemies of the Illithids. Enemies of Man (base) might get the unexcepted help of one of the few Sidhe still living on This Side, and some survivors of the witches or human defenders of Avalon might have survived to attack against Man (Last of the Tuatha). Charred, possessed Wood Golem joining with Pangaea to help stop the fire of Abysia, Harab Elder joining other cold nations in hopes of getting revenge on their relatives, etc etc.