This Trigger Won't Work

I made a trigger that looks like this...
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Events - Unit - A unit is attacked

Conditions - (Unit-Type of (Attacked Unit)) Equal to <Unit1>
-((Attacked Unit) has buff Spirit Shield) Equal to True
-((Attacking Unit) is A structure) Equal to False

Actions - Set <Variable1> = (5+(2x(Level of Spirit Shield for (Casting Unit))))
-Set <Variable2> = (Random Integer between 1 and 100)
-If (All Conditions are True) then do (Then Actions) else do (Else Actions)
--->If - Conditions
-<Variable2> Less than or equal to <Variable1>
--->Then - Actions
-Unit - Order (Attacked unit) to Orc Shadow Hunter - Hex (Attacking unit)
--->Else - Actions
-Do nothing
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The point is to hex the attacking unit, but only if the attacking unit is a unit (not a building) and for the chance to hex to increase with the level of the ability. But it's not working. WHY??!! AHHH! There must be something that I'm not getting, but I have no clue what I'm doing wrong. The ability was built off of Frost Armor (not autocast). If anybody can help me, plz do!

Does the unit that is ordered to Hex have the ability?

uh no... does it have to?

A unit can't cast a move it doesn't have. You might want to create an invisible unit with the locust ability and hex. Then order it to Hex the target, and then remove it.

What is the locust ability? I've never heard of that...

It's an Undead ability that is used by the unit summoned by the Locust spell. It makes the unit that has it unselectable in game.

ah ok thx. ill try that...

Your welcome.