Well, after searching, I figured I supposed to post this suggestion here...
"When an enemy goes to use a spell or attack on you, they glow orange.
What I suggest, is that if an ally (for example, Kayle) is trying to cast a support spell (her heal or Intervention), they should glow blue (originally, I thought green but that is taken by selecting the unit already).
So, what do you reckon?"
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190x7plus7 ?? Senior Member