Aura's

[Bhodar]

I'd like to have a clue how to make aura's with the normal wc3 editor, I need an aura that lowers the defence of the caster, tried to do that with fearie fire, but it kind of didn't work.

 

[Wyvernoid]

Use Devotion Aura instead, set armor bonus to a negative(to do this you'll have to set some checkbox true in File>>Preferences)

 

[Hairybeavet]

or if you just have a few abilities in the game like that then just use shift/click on the values part for unlimited on the values!