Modifying Gameplay cue at run time

This is my gameplay ability that activates the GE_Water gameplay effect.
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Within the gameplay effect (GE_Water), I tie in this gameplay cue tag to allow my gameplay cue to be active whenever this effect is active.

my gameplay cue is this waterball that my character is holding. I want this waterball to shrink everytime I fire my icicle gameplay ability.

I cant seem to figure out how to modify my gameplay cue from my icicle gameplay ability.
I just need to be able to interact from my icicle gameplay ability to my gameplay cue.
I tried blueprint interfaces and casting but it doesnt seem to work.

BP_Interfaces
This is in my gameplay cue event graph: (GC_Water)
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This is in my gameplay ability icicle. (GA_Icicle)
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I want to call that blueprint interface. I am not sure what the target should be. i tried casting from the water gameplay cue (GC_Water) into the target but that didnt work either.