Hey! I've been around for some time but it's time I decided to make my own post, because I need help! I'm just starting so don't eat me pleaase 
I don't know what event response I should use or maybe I have to change everything to make it work?
Also the trigger is not making HE_Unit invulnerable (??)

I don't know what event response I should use or maybe I have to change everything to make it work?
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Faze 1
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Events
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Unit - Hell Emperor 0372 <gen>'s life becomes Less than or Equal to 4000
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Conditions
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Actions
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Unit - Add Faze 1 to HE_Unit
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Unit - Order HE_Unit to Undead: Dreadlord Inferno (Position of (Triggering unit))
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Unit - Make HE_Unit Invulnerable
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If (All Conditions are True) then do (Then Actions) else do (Else Actions)
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If - Conditions
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((Summoned Unit) is alive) Equal to False
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Then - Actions
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Unit - Make HE_Unit Vulnerable
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Else - Actions
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