[Trigger] Player owns 0 units of an type/0 heroes condition

[Null]

I want to make a trigger which makes that the 1st unit which kills an enemy becomes a hero. I want the player to have only 1 hero, but idk what's the condition. Can you pls answer to both questions from the title. Thanks in advance!

 

[Footman16]

You'll need a couple of variables:

PlayerHasHero = False

Event:
Unit Owned by Player 1 (Red) kills a unit

Condition:
PlayerHasHero = False

Actions:
Replace (killing unit) with (insert hero unit here)
Set PlayerHasHero = True

Or alternatively you can just remove the variable and put Turn This Trigger off at the start of the actions of this Trigger.

 

[Null]

what ind of variable is that?

 

[Footman16]

Boolean aka can only be true or false.

 

[Null]

thank you very much!

 

[Footman16]

thank you very much!

No problem, let me know if it works!

 

[Null]

It works! Thx!