This one should be short and simple I think 
Here are the current army specific rules:
Undead
Ethereal
Wight Blades
Nagashi
Nagashi Special Rule
Though they can feel fear like normal men, years spent with the living dead as inured them to their presence. Trained from birth to follow their long dead overlords, their fanaticism knows no bounds.
Any unit with the Nagashi rule are alive and do not benefit from the Undead rule. However they are not affected by Fear that is caused by the Undead special rule.
Whilst the army general is alive they also benefit from the stubborn rule, however should the general die all Nagashi units loose the stubborn rule and must also take a panic check. If failed they must flee towards the nearest table edge. This may mean the unit flees combat in which case the enemy units may pursue or hold as normal.
Here are the current army specific rules:
Undead
Ethereal
Wight Blades
Nagashi
Nagashi Special Rule
Though they can feel fear like normal men, years spent with the living dead as inured them to their presence. Trained from birth to follow their long dead overlords, their fanaticism knows no bounds.
Any unit with the Nagashi rule are alive and do not benefit from the Undead rule. However they are not affected by Fear that is caused by the Undead special rule.
Whilst the army general is alive they also benefit from the stubborn rule, however should the general die all Nagashi units loose the stubborn rule and must also take a panic check. If failed they must flee towards the nearest table edge. This may mean the unit flees combat in which case the enemy units may pursue or hold as normal.