How to make one hero immune to unholy aura

[emil23]

Hi i got 3 heroes, and a trap that gives unholy aura that has negative movement speed when you walk next to it. 2 heroes should be affected by this trap and aura. but the 3 rd one shouldnt be. is there any way to make it working like this?

 

[Uncle]

Trigger the effects of the slow.

A unit comes within X range of Trap -> Pick every unit within X range of Trap -> If picked unit is not equal to Hero 3 -> Order a Dummy unit to Slow picked unit (Or better yet, order the Trap to slow the unit)

If that Event won't work then you can Add all of the Traps to a Unit Group and change the trigger to:
Every 1.00 second -> Pick every unit in TrapGroup -> Pick every unit within X range of Picked Trap -> If picked unit is not equal to Hero 3 -> Slow