Hey,can anyone help finish the spell of harm reduction

Sorry to trouble you guys again, but I've got a problem when I am going to make the spell of harm reduction. The problem is like this:
I want a spell that can reduce the Pierce attack damage from the enemy to 80% and reduce the magic attack damage from the enemy to 75%.

I know I can make it by using the "Defense " skill of the footman, but it really sucks, because it is not flexible enough, and by the way , I think the memory leakage should be kept as few as possible.

Can you do me a favour?

Thanks

There shouldn't be any problems with using the Defense skill, but I think there's an ability called Grace of Elune that is passive and can do that.
You could also check the Weird Warcraft III Ability guide.

Yes, I understand what Jazradel said, but I mean if I want to make a spell like:reduce the Pierce attack damage to X%, x is a random value between 1-100, How can I do it
By the way, the Grace of Elune can't reduce the hero or chaos or normal attack damage, If want to do it ,what can I do
Thanks, Jazradel