[General] Trigger to make all units of a player hostile

[_lycan]

Okay i need a trigger (i suppose it's simple) that does like:

After:
-Stratholme Castle
-Lordaeron Castle (both are buildings).
Have fallen

Make all units of Player 4 blue go hostile.


But here comes the problem, Their heroes (arthas, uther etc) need go go hostile aswell.

(that means also that if they're dead they can't revive) because after this happens i got another trigger that gives player 4 another race, but i don't want him being able to resurrect his old heroes in the altar.

 

[rulerofiron99]

unit group - pick every unit owned by player 4 and do actions
unit - change ownership of picked unit to neutral hostile and retain colour

 

[Vinz]

Maybe.. Set Alliance? Because making it neutral hostile will make it passive to neutral creeps.