[Spell] Help with an aura

Level 3
Sep 9, 2009
So I tried to make an aura that increases your units' armor and decreases the armor of enemy units.

I made the armor decreasing aura based on devotion aura and placed it inside a disabled spell book. The armor increasing one is a modified Devotion aura. I each gave them their custom buffs and set a trigger that would add the spellbook and increase the level of the dummy spell based on the level of the Devotion aura. This part works fine.

The problem is that even though I set the targets to only allow enemies, the armor reduction aura still affects my units. What should I do to fix this?