[Spell] How to add cooldown on ability using Triggers?

[JamesFH]

Im using "Reveal (Neutral Hostile)" Ability. I am trying to add it an cooldown directly from Object Editor. but it Doesn't WORK! is there any possible Trigger that can i use for this? Please help me! Thanks

 

[Nichilus]

Why don't you use the standard Reveal ability that uses cooldown?
If nothing else, you could make a workaround with dummy ability - use a dummy ability (the "channel" ability is best for it) and then make a dummy unit cast the Reveal spell on selected area.