How To??

Im new in map making. All I want to know (so far) is how to make aura that effects negative to enemy troops? (I mean; aura based on endurance aura, but it SLOWs ENEMY units instead of SPEEDING up ALLY units or aura that decreases enemy mana regeneration, or decreases enemy armor, life reg, damage etc.) plz help

You can easily input negative values into spell data fields by holding down shift when double-clicking on the field to modify it. Once you do that, just change "allowed targets" to enemy and you have a slowdown aura.

The game won't normally allow negative values. In order to allow negative values, go to File, then Prefrences, and then tick the box that says "allow negative values".
~Azhag~

And set the targets to "enemy".

Thank you all.