[Spell] Chance to slow the enemy on attack

[AtivEnergy]

Greetings!
I want to create a passive ability just lvl 1 that has 75% chance on each attack to slow the enemy movement speed by 35%(non-stacking) for 0.5 seconds.
After few attepts, I managed to do something but is bugged and with problems and I need your help.
So here is what I did:

• Attack Slow Chance
  • Events
    • Unit - A unit Takes damage
  • Conditions
    • (Unit-type of (Damage source)) Equal to Rifleman
    • (Random integer number between 1 and 100) Less than or equal to 75
  • Actions
    • Game - Display to (All players) the text: asdasdasdf
    • Set VariableSet AttackSlowPoint = (Position of (Damage source))
    • Unit - Create 1 Wisp Attack Slow Dummy for (Owner of (Damage source)) at AttackSlowPoint facing (Position of (Damage Target))
    • Set VariableSet AttackSlowDummy = (Last created unit)
    • Unit - Add a 0.30 second Generic expiration timer to AttackSlowDummy
    • Unit - Add Slow Poison GOOD to AttackSlowDummy
    • Unit - Order AttackSlowDummy to Attack Once (Damage Target)
    • Custom script: call RemoveLocation(udg_AttackSlowPoint)

• Untitled Trigger 002
  • Events
    • Unit - A unit Takes damage
  • Conditions
    • (Unit-type of (Damage source)) Equal to Wisp Attack Slow Dummy
  • Actions
    • Game - Display to (All players) the text: zz
    • Unit - Kill (Damage source)

The second trigger run 2 times on each hit and I don't know why..
And the first trigger will hit the target with a 0.1 sec delay and I can saw how my unit is hitted twice instead of once. Once by Rifleman and once by dummy..
I wish to slow the enemy with 1 visual hit per hit not with 2 visual hits per hit. (if that makes sense)

Maybe there is a better way to make this passive, but i need your help to find that!

I'll attach my map with the problem here.

The help will be appreciated!

 

[Uncle]

The question is, do you really need to rely on a Dummy unit to apply Slow Poison? There's all sorts of complications that come with a "dummy attack".

Couldn't you just have it cast Acid Bomb, or Slow, or any of the other abilities that Slow + potentially deal damage over time.

But if you NEED to rely on Slow Poison then you could probably do this:

• Attack Slow Chance
  • Events
    • Unit - A unit About to take damage
  • Conditions
    • (Unit-type of (Damage source)) Equal to Rifleman
    • (Damage From Normal Attack) Equal to True
    • (Random integer number between 1 and 100) Less than or equal to 75
  • Actions
    • Custom script: local unit udg_Rifleman = GetEventDamageSource()
    • Unit - Add Slow Poison (Rifleman) to Rifleman
    • Wait 0.01 game-time seconds
    • Unit - Remove Slow Poison (Rifleman) from Rifleman

Not sure though... The Event may occur after the buff application.

Edit:
Check if it's an attack. You wouldn't want some damaging Rifleman ability to trigger the Slow Poison:

• (Damage From Normal Attack) Equal to True

 

[AtivEnergy]

The question is, do you really need to rely on a Dummy unit to apply Slow Poison? There's all sorts of complications that come with a "dummy attack".

Couldn't you just have it cast Acid Bomb, or Slow, or any of the other abilities that Slow + potentially deal damage over time.

God i am so noob! You're right, the slow ability is the solution for my problem. I totally forgot about that obvious ability. Thank you for the help!
I'll use the dummy as you told me few threads ago.

• Attack Slow Chance
  • Events
    • Unit - A unit Takes damage
  • Conditions
    • (Unit-type of (Damage source)) Equal to Rifleman
    • (Damage From Normal Attack) Equal to True
    • (Random integer number between 1 and 100) Less than or equal to 75
  • Actions
    • Set VariableSet AttackSlowPoint = (Position of (Damage source))
    • Unit - Create 1 Wisp Attack Slow Dummy for (Owner of (Damage source)) at AttackSlowPoint facing (Position of (Damage Target))
    • Set VariableSet AttackSlowDummy = (Last created unit)
    • Unit - Add a 0.30 second Generic expiration timer to AttackSlowDummy
    • Unit - Add Slow X to AttackSlowDummy
    • Unit - Grant shared vision of (Damage Target) to (Owner of (Damage source))
    • Unit - Order AttackSlowDummy to Human Sorceress - Slow (Damage Target)
    • Unit - Deny shared vision of (Damage Target) to (Owner of (Damage source))
    • Custom script: call RemoveLocation(udg_AttackSlowPoint)