I'm trying to make a new enchantment for armor, and I need to have it detect this. How might I go about doing it? Using latest recommended forge (1.7.2).

 

I'm fairly new at forge (I used to a while back, but I've lost my knowledge), but I'll be able to understand whatyou say, so simplicity is not required.

To make this more direct, I'm trying to make an enchantment that does something like thorns (but doesn't deal damage). I already have the code to make it do what it's supposed to, but not how to have it detect what entity to do it to.