You guys don't seem to comprehend that maybe he wants the missile effect created by Cluster Rockets?
Here's what you do.
Make a trigger. Event should be "A unit starts the effect of an ability". Check that the ability cast is the cluster rockets one you made.
Now, make a dummy spell. Your best bet would be to make a dummy acid bomb. Modify it so it deals the same damage to all units (make the primary and secondary damage the same), remove the armor debuff, and set the duration accordingly. Also make the radius of effect the same as the radius of your cluster rocket spell. If you want a visible buff, then make a custom buff and assign it to the dummy spell. Also, you should remove the missile art from this dummy spell or it'll look stupid. I'm hoping you know how to make dummy spells, because I'm not gonna explain the rest, since it's no different than making any other dummy spell (mana cost, etc.)
Make a dummy caster. I really hope you either already have one or already know how to make one, because I am NOT explaining it to you. If you already have a dummy caster, add the custom acid bomb you made to it (if that's how you cast.). If you add the ability to the caster inside the spell's trigger, then do that instead. As long as the caster has the acid bomb ability in the end, that's all that matters.
Next, in the trigger we made, create the dummy unit and order it to cast Acid Bomb at the Target Location of Ability Being Cast. (Or Target Point... my GUI knowledge is very foggy) For decent accuracy, add a Wait-Game Time count of about .4 seconds before creating and ordering the dummy unit. For perfect accuracy... Use JASS, loops, and timers.
Make sure you clean leaks and remove the dummy unit in the trigger, and all that good stuff. Hope this helped you!
