I have a trigger spell based on the channel ability that looks like this:
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Events
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Unit - A unit starts the effect of an ability
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Conditions
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Ability being cast equal to Rage
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Actions
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Set Caster = Casting Unit
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Set Target = Target unit of abiltity being cast
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Set Random = Random integer number between 2 and 3
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For each (integer A) from 1 to Random do actions
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Loop - Actions
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Unit - Cause Caster to damage Target dealing 100 damage of attack type spell and damage type normal
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Wait 2.00 seconds
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