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How to modifier with group of variable?

I want to modifier one variable but affect to some group of variable.
for example:

modifier “increase magic damage” but affect to “fire damage” and “cold damage”
(+25 magic damage) = (+25 fire damage and +25 cold damage)
or
modifier “increase strength effect” but affect to “health” “mana” and “stamina”
(+25 strength effect) = (+25 health)(+25 stamina)(+25 mana)

so,how to draw a blueprint for this?