I did my own version of this spell it has auras that get rid of thingys they are:
Movement and Attack speed
Life
Mana
And the effects are actualy in the spell not using triggers the only triggers i av used are to create a banish effect on the ward (just to make it look Ghost like) and change is transperity to 50% (to make it look even more ghost like, but unlike urs i called me Ghost Ward and i have 2 triggers to check if it works or not.
My version will be going with my first random spell pack.