How to make the Invulnerable in Vulnerable?

[Ramzor]

I've got a question that may seem simple, but it is something that I can not do.

In my map I have 3 dragons and a building.
At first, the building is invulnerable. However, my intention is that this building becomes vulnerable after the three dragons death.

But in all my attempts, or the building becomes vulnerable after One only dragon death or the building remained invulnerable even with 3 dragons dying.



So I wish someone could help me and tell me how to do the trigger for what I want to happen.


I hope you can help.

Thanks.

 

[Maker]

It could be as simple as this:

• Untitled Trigger 004
  • Events
    • Unit - A unit Dies
  • Conditions
    • (Temp_Unit_1 is alive) Equal to False
    • (Temp_Unit_2 is alive) Equal to False
    • (Temp_Unit_3 is alive) Equal to False
  • Actions
    • Unit - Make Temp_Unit_4 Vulnerable

Temp_Unit_1, 2 and 3 are the darongs, Temp_Unit_4 is the building.

 

[Ramzor]

thaaanks